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qemu-e2k/target-arm/helper.c
Juha Riihimäki 71b3c3dea2 target-arm: allow modifying vfp fpexc en bit only 
All other bits except for the EN in the VFP FPEXC register are defined
as subarchitecture specific and real functionality for any of the
other bits has not been implemented in QEMU. However, current code
allows modifying all bits in the VFP FPEXC register leading to
problems when guest code is writing 1's to the subarchitecture
specific bits and checking whether the bits stay up to verify the
existence of functionality which in fact does not exist in QEMU.
This patch has been revised to include the same behavior change in
the gdb register write function.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Acked-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-10-27 09:46:26 +01:00

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cpu.h"
#include "exec-all.h"
#include "gdbstub.h"
#include "helpers.h"
#include "qemu-common.h"
#include "host-utils.h"
static uint32_t cortexa8_cp15_c0_c1[8] =
{ 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 };
static uint32_t cortexa8_cp15_c0_c2[8] =
{ 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 };
static uint32_t mpcore_cp15_c0_c1[8] =
{ 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 };
static uint32_t mpcore_cp15_c0_c2[8] =
{ 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 };
static uint32_t arm1136_cp15_c0_c1[8] =
{ 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 };
static uint32_t arm1136_cp15_c0_c2[8] =
{ 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 };
static uint32_t cpu_arm_find_by_name(const char *name);
static inline void set_feature(CPUARMState *env, int feature)
{
env->features |= 1u << feature;
}
static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
{
env->cp15.c0_cpuid = id;
switch (id) {
case ARM_CPUID_ARM926:
set_feature(env, ARM_FEATURE_VFP);
env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
env->cp15.c0_cachetype = 0x1dd20d2;
env->cp15.c1_sys = 0x00090078;
break;
case ARM_CPUID_ARM946:
set_feature(env, ARM_FEATURE_MPU);
env->cp15.c0_cachetype = 0x0f004006;
env->cp15.c1_sys = 0x00000078;
break;
case ARM_CPUID_ARM1026:
set_feature(env, ARM_FEATURE_VFP);
set_feature(env, ARM_FEATURE_AUXCR);
env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
env->cp15.c0_cachetype = 0x1dd20d2;
env->cp15.c1_sys = 0x00090078;
break;
case ARM_CPUID_ARM1136_R2:
case ARM_CPUID_ARM1136:
set_feature(env, ARM_FEATURE_V6);
set_feature(env, ARM_FEATURE_VFP);
set_feature(env, ARM_FEATURE_AUXCR);
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t));
memcpy(env->cp15.c0_c2, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t));
env->cp15.c0_cachetype = 0x1dd20d2;
break;
case ARM_CPUID_ARM11MPCORE:
set_feature(env, ARM_FEATURE_V6);
set_feature(env, ARM_FEATURE_V6K);
set_feature(env, ARM_FEATURE_VFP);
set_feature(env, ARM_FEATURE_AUXCR);
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t));
memcpy(env->cp15.c0_c2, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t));
env->cp15.c0_cachetype = 0x1dd20d2;
break;
case ARM_CPUID_CORTEXA8:
set_feature(env, ARM_FEATURE_V6);
set_feature(env, ARM_FEATURE_V6K);
set_feature(env, ARM_FEATURE_V7);
set_feature(env, ARM_FEATURE_AUXCR);
set_feature(env, ARM_FEATURE_THUMB2);
set_feature(env, ARM_FEATURE_VFP);
set_feature(env, ARM_FEATURE_VFP3);
set_feature(env, ARM_FEATURE_NEON);
set_feature(env, ARM_FEATURE_THUMB2EE);
env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t));
memcpy(env->cp15.c0_c2, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t));
env->cp15.c0_cachetype = 0x82048004;
env->cp15.c0_clid = (1 << 27) | (2 << 24) | 3;
env->cp15.c0_ccsid[0] = 0xe007e01a; /* 16k L1 dcache. */
env->cp15.c0_ccsid[1] = 0x2007e01a; /* 16k L1 icache. */
env->cp15.c0_ccsid[2] = 0xf0000000; /* No L2 icache. */
break;
case ARM_CPUID_CORTEXM3:
set_feature(env, ARM_FEATURE_V6);
set_feature(env, ARM_FEATURE_THUMB2);
set_feature(env, ARM_FEATURE_V7);
set_feature(env, ARM_FEATURE_M);
set_feature(env, ARM_FEATURE_DIV);
break;
case ARM_CPUID_ANY: /* For userspace emulation. */
set_feature(env, ARM_FEATURE_V6);
set_feature(env, ARM_FEATURE_V6K);
set_feature(env, ARM_FEATURE_V7);
set_feature(env, ARM_FEATURE_THUMB2);
set_feature(env, ARM_FEATURE_VFP);
set_feature(env, ARM_FEATURE_VFP3);
set_feature(env, ARM_FEATURE_NEON);
set_feature(env, ARM_FEATURE_THUMB2EE);
set_feature(env, ARM_FEATURE_DIV);
break;
case ARM_CPUID_TI915T:
case ARM_CPUID_TI925T:
set_feature(env, ARM_FEATURE_OMAPCP);
env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
env->cp15.c0_cachetype = 0x5109149;
env->cp15.c1_sys = 0x00000070;
env->cp15.c15_i_max = 0x000;
env->cp15.c15_i_min = 0xff0;
break;
case ARM_CPUID_PXA250:
case ARM_CPUID_PXA255:
case ARM_CPUID_PXA260:
case ARM_CPUID_PXA261:
case ARM_CPUID_PXA262:
set_feature(env, ARM_FEATURE_XSCALE);
/* JTAG_ID is ((id << 28) | 0x09265013) */
env->cp15.c0_cachetype = 0xd172172;
env->cp15.c1_sys = 0x00000078;
break;
case ARM_CPUID_PXA270_A0:
case ARM_CPUID_PXA270_A1:
case ARM_CPUID_PXA270_B0:
case ARM_CPUID_PXA270_B1:
case ARM_CPUID_PXA270_C0:
case ARM_CPUID_PXA270_C5:
set_feature(env, ARM_FEATURE_XSCALE);
/* JTAG_ID is ((id << 28) | 0x09265013) */
set_feature(env, ARM_FEATURE_IWMMXT);
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
env->cp15.c0_cachetype = 0xd172172;
env->cp15.c1_sys = 0x00000078;
break;
default:
cpu_abort(env, "Bad CPU ID: %x\n", id);
break;
}
}
void cpu_reset(CPUARMState *env)
{
uint32_t id;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, 0);
}
id = env->cp15.c0_cpuid;
memset(env, 0, offsetof(CPUARMState, breakpoints));
if (id)
cpu_reset_model_id(env, id);
#if defined (CONFIG_USER_ONLY)
env->uncached_cpsr = ARM_CPU_MODE_USR;
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
#else
/* SVC mode with interrupts disabled. */
env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I;
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
clear at reset. */
if (IS_M(env))
env->uncached_cpsr &= ~CPSR_I;
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
env->cp15.c2_base_mask = 0xffffc000u;
#endif
env->regs[15] = 0;
tlb_flush(env, 1);
}
static int vfp_gdb_get_reg(CPUState *env, uint8_t *buf, int reg)
{
int nregs;
/* VFP data registers are always little-endian. */
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
if (reg < nregs) {
stfq_le_p(buf, env->vfp.regs[reg]);
return 8;
}
if (arm_feature(env, ARM_FEATURE_NEON)) {
/* Aliases for Q regs. */
nregs += 16;
if (reg < nregs) {
stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]);
stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]);
return 16;
}
}
switch (reg - nregs) {
case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
}
return 0;
}
static int vfp_gdb_set_reg(CPUState *env, uint8_t *buf, int reg)
{
int nregs;
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
if (reg < nregs) {
env->vfp.regs[reg] = ldfq_le_p(buf);
return 8;
}
if (arm_feature(env, ARM_FEATURE_NEON)) {
nregs += 16;
if (reg < nregs) {
env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf);
env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8);
return 16;
}
}
switch (reg - nregs) {
case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
}
return 0;
}
CPUARMState *cpu_arm_init(const char *cpu_model)
{
CPUARMState *env;
uint32_t id;
static int inited = 0;
id = cpu_arm_find_by_name(cpu_model);
if (id == 0)
return NULL;
env = qemu_mallocz(sizeof(CPUARMState));
cpu_exec_init(env);
if (!inited) {
inited = 1;
arm_translate_init();
}
env->cpu_model_str = cpu_model;
env->cp15.c0_cpuid = id;
cpu_reset(env);
if (arm_feature(env, ARM_FEATURE_NEON)) {
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
51, "arm-neon.xml", 0);
} else if (arm_feature(env, ARM_FEATURE_VFP3)) {
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
35, "arm-vfp3.xml", 0);
} else if (arm_feature(env, ARM_FEATURE_VFP)) {
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
19, "arm-vfp.xml", 0);
}
qemu_init_vcpu(env);
return env;
}
struct arm_cpu_t {
uint32_t id;
const char *name;
};
static const struct arm_cpu_t arm_cpu_names[] = {
{ ARM_CPUID_ARM926, "arm926"},
{ ARM_CPUID_ARM946, "arm946"},
{ ARM_CPUID_ARM1026, "arm1026"},
{ ARM_CPUID_ARM1136, "arm1136"},
{ ARM_CPUID_ARM1136_R2, "arm1136-r2"},
{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
{ ARM_CPUID_CORTEXM3, "cortex-m3"},
{ ARM_CPUID_CORTEXA8, "cortex-a8"},
{ ARM_CPUID_TI925T, "ti925t" },
{ ARM_CPUID_PXA250, "pxa250" },
{ ARM_CPUID_PXA255, "pxa255" },
{ ARM_CPUID_PXA260, "pxa260" },
{ ARM_CPUID_PXA261, "pxa261" },
{ ARM_CPUID_PXA262, "pxa262" },
{ ARM_CPUID_PXA270, "pxa270" },
{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
{ ARM_CPUID_ANY, "any"},
{ 0, NULL}
};
void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
{
int i;
(*cpu_fprintf)(f, "Available CPUs:\n");
for (i = 0; arm_cpu_names[i].name; i++) {
(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
}
}
/* return 0 if not found */
static uint32_t cpu_arm_find_by_name(const char *name)
{
int i;
uint32_t id;
id = 0;
for (i = 0; arm_cpu_names[i].name; i++) {
if (strcmp(name, arm_cpu_names[i].name) == 0) {
id = arm_cpu_names[i].id;
break;
}
}
return id;
}
void cpu_arm_close(CPUARMState *env)
{
free(env);
}
uint32_t cpsr_read(CPUARMState *env)
{
int ZF;
ZF = (env->ZF == 0);
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
| ((env->condexec_bits & 0xfc) << 8)
| (env->GE << 16);
}
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
{
if (mask & CPSR_NZCV) {
env->ZF = (~val) & CPSR_Z;
env->NF = val;
env->CF = (val >> 29) & 1;
env->VF = (val << 3) & 0x80000000;
}
if (mask & CPSR_Q)
env->QF = ((val & CPSR_Q) != 0);
if (mask & CPSR_T)
env->thumb = ((val & CPSR_T) != 0);
if (mask & CPSR_IT_0_1) {
env->condexec_bits &= ~3;
env->condexec_bits |= (val >> 25) & 3;
}
if (mask & CPSR_IT_2_7) {
env->condexec_bits &= 3;
env->condexec_bits |= (val >> 8) & 0xfc;
}
if (mask & CPSR_GE) {
env->GE = (val >> 16) & 0xf;
}
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
switch_mode(env, val & CPSR_M);
}
mask &= ~CACHED_CPSR_BITS;
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
}
/* Sign/zero extend */
uint32_t HELPER(sxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(int8_t)x;
res |= (uint32_t)(int8_t)(x >> 16) << 16;
return res;
}
uint32_t HELPER(uxtb16)(uint32_t x)
{
uint32_t res;
res = (uint16_t)(uint8_t)x;
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
return res;
}
uint32_t HELPER(clz)(uint32_t x)
{
return clz32(x);
}
int32_t HELPER(sdiv)(int32_t num, int32_t den)
{
if (den == 0)
return 0;
if (num == INT_MIN && den == -1)
return INT_MIN;
return num / den;
}
uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
{
if (den == 0)
return 0;
return num / den;
}
uint32_t HELPER(rbit)(uint32_t x)
{
x = ((x & 0xff000000) >> 24)
| ((x & 0x00ff0000) >> 8)
| ((x & 0x0000ff00) << 8)
| ((x & 0x000000ff) << 24);
x = ((x & 0xf0f0f0f0) >> 4)
| ((x & 0x0f0f0f0f) << 4);
x = ((x & 0x88888888) >> 3)
| ((x & 0x44444444) >> 1)
| ((x & 0x22222222) << 1)
| ((x & 0x11111111) << 3);
return x;
}
uint32_t HELPER(abs)(uint32_t x)
{
return ((int32_t)x < 0) ? -x : x;
}
#if defined(CONFIG_USER_ONLY)
void do_interrupt (CPUState *env)
{
env->exception_index = -1;
}
/* Structure used to record exclusive memory locations. */
typedef struct mmon_state {
struct mmon_state *next;
CPUARMState *cpu_env;
uint32_t addr;
} mmon_state;
/* Chain of current locks. */
static mmon_state* mmon_head = NULL;
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
if (rw == 2) {
env->exception_index = EXCP_PREFETCH_ABORT;
env->cp15.c6_insn = address;
} else {
env->exception_index = EXCP_DATA_ABORT;
env->cp15.c6_data = address;
}
return 1;
}
static void allocate_mmon_state(CPUState *env)
{
env->mmon_entry = malloc(sizeof (mmon_state));
memset (env->mmon_entry, 0, sizeof (mmon_state));
env->mmon_entry->cpu_env = env;
mmon_head = env->mmon_entry;
}
/* Flush any monitor locks for the specified address. */
static void flush_mmon(uint32_t addr)
{
mmon_state *mon;
for (mon = mmon_head; mon; mon = mon->next)
{
if (mon->addr != addr)
continue;
mon->addr = 0;
break;
}
}
/* Mark an address for exclusive access. */
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
{
if (!env->mmon_entry)
allocate_mmon_state(env);
/* Clear any previous locks. */
flush_mmon(addr);
env->mmon_entry->addr = addr;
}
/* Test if an exclusive address is still exclusive. Returns zero
if the address is still exclusive. */
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr)
{
int res;
if (!env->mmon_entry)
return 1;
if (env->mmon_entry->addr == addr)
res = 0;
else
res = 1;
flush_mmon(addr);
return res;
}
void HELPER(clrex)(CPUState *env)
{
if (!(env->mmon_entry && env->mmon_entry->addr))
return;
flush_mmon(env->mmon_entry->addr);
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
{
return addr;
}
/* These should probably raise undefined insn exceptions. */
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
{
int op1 = (insn >> 8) & 0xf;
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
return;
}
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn)
{
int op1 = (insn >> 8) & 0xf;
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
return 0;
}
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
{
cpu_abort(env, "cp15 insn %08x\n", insn);
}
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
{
cpu_abort(env, "cp15 insn %08x\n", insn);
return 0;
}
/* These should probably raise undefined insn exceptions. */
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
{
cpu_abort(env, "v7m_mrs %d\n", reg);
}
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg)
{
cpu_abort(env, "v7m_mrs %d\n", reg);
return 0;
}
void switch_mode(CPUState *env, int mode)
{
if (mode != ARM_CPU_MODE_USR)
cpu_abort(env, "Tried to switch out of user mode\n");
}
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
{
cpu_abort(env, "banked r13 write\n");
}
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
{
cpu_abort(env, "banked r13 read\n");
return 0;
}
#else
extern int semihosting_enabled;
/* Map CPU modes onto saved register banks. */
static inline int bank_number (int mode)
{
switch (mode) {
case ARM_CPU_MODE_USR:
case ARM_CPU_MODE_SYS:
return 0;
case ARM_CPU_MODE_SVC:
return 1;
case ARM_CPU_MODE_ABT:
return 2;
case ARM_CPU_MODE_UND:
return 3;
case ARM_CPU_MODE_IRQ:
return 4;
case ARM_CPU_MODE_FIQ:
return 5;
}
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
return -1;
}
void switch_mode(CPUState *env, int mode)
{
int old_mode;
int i;
old_mode = env->uncached_cpsr & CPSR_M;
if (mode == old_mode)
return;
if (old_mode == ARM_CPU_MODE_FIQ) {
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
} else if (mode == ARM_CPU_MODE_FIQ) {
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
}
i = bank_number(old_mode);
env->banked_r13[i] = env->regs[13];
env->banked_r14[i] = env->regs[14];
env->banked_spsr[i] = env->spsr;
i = bank_number(mode);
env->regs[13] = env->banked_r13[i];
env->regs[14] = env->banked_r14[i];
env->spsr = env->banked_spsr[i];
}
static void v7m_push(CPUARMState *env, uint32_t val)
{
env->regs[13] -= 4;
stl_phys(env->regs[13], val);
}
static uint32_t v7m_pop(CPUARMState *env)
{
uint32_t val;
val = ldl_phys(env->regs[13]);
env->regs[13] += 4;
return val;
}
/* Switch to V7M main or process stack pointer. */
static void switch_v7m_sp(CPUARMState *env, int process)
{
uint32_t tmp;
if (env->v7m.current_sp != process) {
tmp = env->v7m.other_sp;
env->v7m.other_sp = env->regs[13];
env->regs[13] = tmp;
env->v7m.current_sp = process;
}
}
static void do_v7m_exception_exit(CPUARMState *env)
{
uint32_t type;
uint32_t xpsr;
type = env->regs[15];
if (env->v7m.exception != 0)
armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception);
/* Switch to the target stack. */
switch_v7m_sp(env, (type & 4) != 0);
/* Pop registers. */
env->regs[0] = v7m_pop(env);
env->regs[1] = v7m_pop(env);
env->regs[2] = v7m_pop(env);
env->regs[3] = v7m_pop(env);
env->regs[12] = v7m_pop(env);
env->regs[14] = v7m_pop(env);
env->regs[15] = v7m_pop(env);
xpsr = v7m_pop(env);
xpsr_write(env, xpsr, 0xfffffdff);
/* Undo stack alignment. */
if (xpsr & 0x200)
env->regs[13] |= 4;
/* ??? The exception return type specifies Thread/Handler mode. However
this is also implied by the xPSR value. Not sure what to do
if there is a mismatch. */
/* ??? Likewise for mismatches between the CONTROL register and the stack
pointer. */
}
static void do_interrupt_v7m(CPUARMState *env)
{
uint32_t xpsr = xpsr_read(env);
uint32_t lr;
uint32_t addr;
lr = 0xfffffff1;
if (env->v7m.current_sp)
lr |= 4;
if (env->v7m.exception == 0)
lr |= 8;
/* For exceptions we just mark as pending on the NVIC, and let that
handle it. */
/* TODO: Need to escalate if the current priority is higher than the
one we're raising. */
switch (env->exception_index) {
case EXCP_UDEF:
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE);
return;
case EXCP_SWI:
env->regs[15] += 2;
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC);
return;
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM);
return;
case EXCP_BKPT:
if (semihosting_enabled) {
int nr;
nr = lduw_code(env->regs[15]) & 0xff;
if (nr == 0xab) {
env->regs[15] += 2;
env->regs[0] = do_arm_semihosting(env);
return;
}
}
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG);
return;
case EXCP_IRQ:
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic);
break;
case EXCP_EXCEPTION_EXIT:
do_v7m_exception_exit(env);
return;
default:
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
return; /* Never happens. Keep compiler happy. */
}
/* Align stack pointer. */
/* ??? Should only do this if Configuration Control Register
STACKALIGN bit is set. */
if (env->regs[13] & 4) {
env->regs[13] -= 4;
xpsr |= 0x200;
}
/* Switch to the handler mode. */
v7m_push(env, xpsr);
v7m_push(env, env->regs[15]);
v7m_push(env, env->regs[14]);
v7m_push(env, env->regs[12]);
v7m_push(env, env->regs[3]);
v7m_push(env, env->regs[2]);
v7m_push(env, env->regs[1]);
v7m_push(env, env->regs[0]);
switch_v7m_sp(env, 0);
env->uncached_cpsr &= ~CPSR_IT;
env->regs[14] = lr;
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
env->regs[15] = addr & 0xfffffffe;
env->thumb = addr & 1;
}
/* Handle a CPU exception. */
void do_interrupt(CPUARMState *env)
{
uint32_t addr;
uint32_t mask;
int new_mode;
uint32_t offset;
if (IS_M(env)) {
do_interrupt_v7m(env);
return;
}
/* TODO: Vectored interrupt controller. */
switch (env->exception_index) {
case EXCP_UDEF:
new_mode = ARM_CPU_MODE_UND;
addr = 0x04;
mask = CPSR_I;
if (env->thumb)
offset = 2;
else
offset = 4;
break;
case EXCP_SWI:
if (semihosting_enabled) {
/* Check for semihosting interrupt. */
if (env->thumb) {
mask = lduw_code(env->regs[15] - 2) & 0xff;
} else {
mask = ldl_code(env->regs[15] - 4) & 0xffffff;
}
/* Only intercept calls from privileged modes, to provide some
semblance of security. */
if (((mask == 0x123456 && !env->thumb)
|| (mask == 0xab && env->thumb))
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
env->regs[0] = do_arm_semihosting(env);
return;
}
}
new_mode = ARM_CPU_MODE_SVC;
addr = 0x08;
mask = CPSR_I;
/* The PC already points to the next instruction. */
offset = 0;
break;
case EXCP_BKPT:
/* See if this is a semihosting syscall. */
if (env->thumb && semihosting_enabled) {
mask = lduw_code(env->regs[15]) & 0xff;
if (mask == 0xab
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
env->regs[15] += 2;
env->regs[0] = do_arm_semihosting(env);
return;
}
}
/* Fall through to prefetch abort. */
case EXCP_PREFETCH_ABORT:
new_mode = ARM_CPU_MODE_ABT;
addr = 0x0c;
mask = CPSR_A | CPSR_I;
offset = 4;
break;
case EXCP_DATA_ABORT:
new_mode = ARM_CPU_MODE_ABT;
addr = 0x10;
mask = CPSR_A | CPSR_I;
offset = 8;
break;
case EXCP_IRQ:
new_mode = ARM_CPU_MODE_IRQ;
addr = 0x18;
/* Disable IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I;
offset = 4;
break;
case EXCP_FIQ:
new_mode = ARM_CPU_MODE_FIQ;
addr = 0x1c;
/* Disable FIQ, IRQ and imprecise data aborts. */
mask = CPSR_A | CPSR_I | CPSR_F;
offset = 4;
break;
default:
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
return; /* Never happens. Keep compiler happy. */
}
/* High vectors. */
if (env->cp15.c1_sys & (1 << 13)) {
addr += 0xffff0000;
}
switch_mode (env, new_mode);
env->spsr = cpsr_read(env);
/* Clear IT bits. */
env->condexec_bits = 0;
/* Switch to the new mode, and switch to Arm mode. */
/* ??? Thumb interrupt handlers not implemented. */
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
env->uncached_cpsr |= mask;
env->thumb = 0;
env->regs[14] = env->regs[15] + offset;
env->regs[15] = addr;
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
}
/* Check section/page access permissions.
Returns the page protection flags, or zero if the access is not
permitted. */
static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
int is_user)
{
int prot_ro;
if (domain == 3)
return PAGE_READ | PAGE_WRITE;
if (access_type == 1)
prot_ro = 0;
else
prot_ro = PAGE_READ;
switch (ap) {
case 0:
if (access_type == 1)
return 0;
switch ((env->cp15.c1_sys >> 8) & 3) {
case 1:
return is_user ? 0 : PAGE_READ;
case 2:
return PAGE_READ;
default:
return 0;
}
case 1:
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
case 2:
if (is_user)
return prot_ro;
else
return PAGE_READ | PAGE_WRITE;
case 3:
return PAGE_READ | PAGE_WRITE;
case 4: /* Reserved. */
return 0;
case 5:
return is_user ? 0 : prot_ro;
case 6:
return prot_ro;
case 7:
if (!arm_feature (env, ARM_FEATURE_V7))
return 0;
return prot_ro;
default:
abort();
}
}
static uint32_t get_level1_table_address(CPUState *env, uint32_t address)
{
uint32_t table;
if (address & env->cp15.c2_mask)
table = env->cp15.c2_base1 & 0xffffc000;
else
table = env->cp15.c2_base0 & env->cp15.c2_base_mask;
table |= (address >> 18) & 0x3ffc;
return table;
}
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
int is_user, uint32_t *phys_ptr, int *prot)
{
int code;
uint32_t table;
uint32_t desc;
int type;
int ap;
int domain;
uint32_t phys_addr;
/* Pagetable walk. */
/* Lookup l1 descriptor. */
table = get_level1_table_address(env, address);
desc = ldl_phys(table);
type = (desc & 3);
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3;
if (type == 0) {
/* Section translation fault. */
code = 5;
goto do_fault;
}
if (domain == 0 || domain == 2) {
if (type == 2)
code = 9; /* Section domain fault. */
else
code = 11; /* Page domain fault. */
goto do_fault;
}
if (type == 2) {
/* 1Mb section. */
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
ap = (desc >> 10) & 3;
code = 13;
} else {
/* Lookup l2 entry. */
if (type == 1) {
/* Coarse pagetable. */
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
} else {
/* Fine pagetable. */
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
}
desc = ldl_phys(table);
switch (desc & 3) {
case 0: /* Page translation fault. */
code = 7;
goto do_fault;
case 1: /* 64k page. */
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
break;
case 2: /* 4k page. */
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
break;
case 3: /* 1k page. */
if (type == 1) {
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
} else {
/* Page translation fault. */
code = 7;
goto do_fault;
}
} else {
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
}
ap = (desc >> 4) & 3;
break;
default:
/* Never happens, but compiler isn't smart enough to tell. */
abort();
}
code = 15;
}
*prot = check_ap(env, ap, domain, access_type, is_user);
if (!*prot) {
/* Access permission fault. */
goto do_fault;
}
*phys_ptr = phys_addr;
return 0;
do_fault:
return code | (domain << 4);
}
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
int is_user, uint32_t *phys_ptr, int *prot)
{
int code;
uint32_t table;
uint32_t desc;
uint32_t xn;
int type;
int ap;
int domain;
uint32_t phys_addr;
/* Pagetable walk. */
/* Lookup l1 descriptor. */
table = get_level1_table_address(env, address);
desc = ldl_phys(table);
type = (desc & 3);
if (type == 0) {
/* Section translation fault. */
code = 5;
domain = 0;
goto do_fault;
} else if (type == 2 && (desc & (1 << 18))) {
/* Supersection. */
domain = 0;
} else {
/* Section or page. */
domain = (desc >> 4) & 0x1e;
}
domain = (env->cp15.c3 >> domain) & 3;
if (domain == 0 || domain == 2) {
if (type == 2)
code = 9; /* Section domain fault. */
else
code = 11; /* Page domain fault. */
goto do_fault;
}
if (type == 2) {
if (desc & (1 << 18)) {
/* Supersection. */
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
} else {
/* Section. */
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
}
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
xn = desc & (1 << 4);
code = 13;
} else {
/* Lookup l2 entry. */
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
desc = ldl_phys(table);
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
switch (desc & 3) {
case 0: /* Page translation fault. */
code = 7;
goto do_fault;
case 1: /* 64k page. */
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
xn = desc & (1 << 15);
break;
case 2: case 3: /* 4k page. */
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
xn = desc & 1;
break;
default:
/* Never happens, but compiler isn't smart enough to tell. */
abort();
}
code = 15;
}
if (xn && access_type == 2)
goto do_fault;
/* The simplified model uses AP[0] as an access control bit. */
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) {
/* Access flag fault. */
code = (code == 15) ? 6 : 3;
goto do_fault;
}
*prot = check_ap(env, ap, domain, access_type, is_user);
if (!*prot) {
/* Access permission fault. */
goto do_fault;
}
*phys_ptr = phys_addr;
return 0;
do_fault:
return code | (domain << 4);
}
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type,
int is_user, uint32_t *phys_ptr, int *prot)
{
int n;
uint32_t mask;
uint32_t base;
*phys_ptr = address;
for (n = 7; n >= 0; n--) {
base = env->cp15.c6_region[n];
if ((base & 1) == 0)
continue;
mask = 1 << ((base >> 1) & 0x1f);
/* Keep this shift separate from the above to avoid an
(undefined) << 32. */
mask = (mask << 1) - 1;
if (((base ^ address) & ~mask) == 0)
break;
}
if (n < 0)
return 2;
if (access_type == 2) {
mask = env->cp15.c5_insn;
} else {
mask = env->cp15.c5_data;
}
mask = (mask >> (n * 4)) & 0xf;
switch (mask) {
case 0:
return 1;
case 1:
if (is_user)
return 1;
*prot = PAGE_READ | PAGE_WRITE;
break;
case 2:
*prot = PAGE_READ;
if (!is_user)
*prot |= PAGE_WRITE;
break;
case 3:
*prot = PAGE_READ | PAGE_WRITE;
break;
case 5:
if (is_user)
return 1;
*prot = PAGE_READ;
break;
case 6:
*prot = PAGE_READ;
break;
default:
/* Bad permission. */
return 1;
}
return 0;
}
static inline int get_phys_addr(CPUState *env, uint32_t address,
int access_type, int is_user,
uint32_t *phys_ptr, int *prot)
{
/* Fast Context Switch Extension. */
if (address < 0x02000000)
address += env->cp15.c13_fcse;
if ((env->cp15.c1_sys & 1) == 0) {
/* MMU/MPU disabled. */
*phys_ptr = address;
*prot = PAGE_READ | PAGE_WRITE;
return 0;
} else if (arm_feature(env, ARM_FEATURE_MPU)) {
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
prot);
} else if (env->cp15.c1_sys & (1 << 23)) {
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
prot);
} else {
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
prot);
}
}
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
int access_type, int mmu_idx, int is_softmmu)
{
uint32_t phys_addr;
int prot;
int ret, is_user;
is_user = mmu_idx == MMU_USER_IDX;
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot);
if (ret == 0) {
/* Map a single [sub]page. */
phys_addr &= ~(uint32_t)0x3ff;
address &= ~(uint32_t)0x3ff;
return tlb_set_page (env, address, phys_addr, prot, mmu_idx,
is_softmmu);
}
if (access_type == 2) {
env->cp15.c5_insn = ret;
env->cp15.c6_insn = address;
env->exception_index = EXCP_PREFETCH_ABORT;
} else {
env->cp15.c5_data = ret;
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6))
env->cp15.c5_data |= (1 << 11);
env->cp15.c6_data = address;
env->exception_index = EXCP_DATA_ABORT;
}
return 1;
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
{
uint32_t phys_addr;
int prot;
int ret;
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot);
if (ret != 0)
return -1;
return phys_addr;
}
/* Not really implemented. Need to figure out a sane way of doing this.
Maybe add generic watchpoint support and use that. */
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
{
env->mmon_addr = addr;
}
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr)
{
return (env->mmon_addr != addr);
}
void HELPER(clrex)(CPUState *env)
{
env->mmon_addr = -1;
}
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
{
int cp_num = (insn >> 8) & 0xf;
int cp_info = (insn >> 5) & 7;
int src = (insn >> 16) & 0xf;
int operand = insn & 0xf;
if (env->cp[cp_num].cp_write)
env->cp[cp_num].cp_write(env->cp[cp_num].opaque,
cp_info, src, operand, val);
}
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn)
{
int cp_num = (insn >> 8) & 0xf;
int cp_info = (insn >> 5) & 7;
int dest = (insn >> 16) & 0xf;
int operand = insn & 0xf;
if (env->cp[cp_num].cp_read)
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
cp_info, dest, operand);
return 0;
}
/* Return basic MPU access permission bits. */
static uint32_t simple_mpu_ap_bits(uint32_t val)
{
uint32_t ret;
uint32_t mask;
int i;
ret = 0;
mask = 3;
for (i = 0; i < 16; i += 2) {
ret |= (val >> i) & mask;
mask <<= 2;
}
return ret;
}
/* Pad basic MPU access permission bits to extended format. */
static uint32_t extended_mpu_ap_bits(uint32_t val)
{
uint32_t ret;
uint32_t mask;
int i;
ret = 0;
mask = 3;
for (i = 0; i < 16; i += 2) {
ret |= (val & mask) << i;
mask <<= 2;
}
return ret;
}
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
{
int op1;
int op2;
int crm;
op1 = (insn >> 21) & 7;
op2 = (insn >> 5) & 7;
crm = insn & 0xf;
switch ((insn >> 16) & 0xf) {
case 0:
/* ID codes. */
if (arm_feature(env, ARM_FEATURE_XSCALE))
break;
if (arm_feature(env, ARM_FEATURE_OMAPCP))
break;
if (arm_feature(env, ARM_FEATURE_V7)
&& op1 == 2 && crm == 0 && op2 == 0) {
env->cp15.c0_cssel = val & 0xf;
break;
}
goto bad_reg;
case 1: /* System configuration. */
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0:
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0)
env->cp15.c1_sys = val;
/* ??? Lots of these bits are not implemented. */
/* This may enable/disable the MMU, so do a TLB flush. */
tlb_flush(env, 1);
break;
case 1: /* Auxiliary cotrol register. */
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
env->cp15.c1_xscaleauxcr = val;
break;
}
/* Not implemented. */
break;
case 2:
if (arm_feature(env, ARM_FEATURE_XSCALE))
goto bad_reg;
if (env->cp15.c1_coproc != val) {
env->cp15.c1_coproc = val;
/* ??? Is this safe when called from within a TB? */
tb_flush(env);
}
break;
default:
goto bad_reg;
}
break;
case 2: /* MMU Page table control / MPU cache control. */
if (arm_feature(env, ARM_FEATURE_MPU)) {
switch (op2) {
case 0:
env->cp15.c2_data = val;
break;
case 1:
env->cp15.c2_insn = val;
break;
default:
goto bad_reg;
}
} else {
switch (op2) {
case 0:
env->cp15.c2_base0 = val;
break;
case 1:
env->cp15.c2_base1 = val;
break;
case 2:
val &= 7;
env->cp15.c2_control = val;
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val);
break;
default:
goto bad_reg;
}
}
break;
case 3: /* MMU Domain access control / MPU write buffer control. */
env->cp15.c3 = val;
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
break;
case 4: /* Reserved. */
goto bad_reg;
case 5: /* MMU Fault status / MPU access permission. */
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0:
if (arm_feature(env, ARM_FEATURE_MPU))
val = extended_mpu_ap_bits(val);
env->cp15.c5_data = val;
break;
case 1:
if (arm_feature(env, ARM_FEATURE_MPU))
val = extended_mpu_ap_bits(val);
env->cp15.c5_insn = val;
break;
case 2:
if (!arm_feature(env, ARM_FEATURE_MPU))
goto bad_reg;
env->cp15.c5_data = val;
break;
case 3:
if (!arm_feature(env, ARM_FEATURE_MPU))
goto bad_reg;
env->cp15.c5_insn = val;
break;
default:
goto bad_reg;
}
break;
case 6: /* MMU Fault address / MPU base/size. */
if (arm_feature(env, ARM_FEATURE_MPU)) {
if (crm >= 8)
goto bad_reg;
env->cp15.c6_region[crm] = val;
} else {
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0:
env->cp15.c6_data = val;
break;
case 1: /* ??? This is WFAR on armv6 */
case 2:
env->cp15.c6_insn = val;
break;
default:
goto bad_reg;
}
}
break;
case 7: /* Cache control. */
env->cp15.c15_i_max = 0x000;
env->cp15.c15_i_min = 0xff0;
/* No cache, so nothing to do. */
/* ??? MPCore has VA to PA translation functions. */
break;
case 8: /* MMU TLB control. */
switch (op2) {
case 0: /* Invalidate all. */
tlb_flush(env, 0);
break;
case 1: /* Invalidate single TLB entry. */
#if 0
/* ??? This is wrong for large pages and sections. */
/* As an ugly hack to make linux work we always flush a 4K
pages. */
val &= 0xfffff000;
tlb_flush_page(env, val);
tlb_flush_page(env, val + 0x400);
tlb_flush_page(env, val + 0x800);
tlb_flush_page(env, val + 0xc00);
#else
tlb_flush(env, 1);
#endif
break;
case 2: /* Invalidate on ASID. */
tlb_flush(env, val == 0);
break;
case 3: /* Invalidate single entry on MVA. */
/* ??? This is like case 1, but ignores ASID. */
tlb_flush(env, 1);
break;
default:
goto bad_reg;
}
break;
case 9:
if (arm_feature(env, ARM_FEATURE_OMAPCP))
break;
switch (crm) {
case 0: /* Cache lockdown. */
switch (op1) {
case 0: /* L1 cache. */
switch (op2) {
case 0:
env->cp15.c9_data = val;
break;
case 1:
env->cp15.c9_insn = val;
break;
default:
goto bad_reg;
}
break;
case 1: /* L2 cache. */
/* Ignore writes to L2 lockdown/auxiliary registers. */
break;
default:
goto bad_reg;
}
break;
case 1: /* TCM memory region registers. */
/* Not implemented. */
goto bad_reg;
default:
goto bad_reg;
}
break;
case 10: /* MMU TLB lockdown. */
/* ??? TLB lockdown not implemented. */
break;
case 12: /* Reserved. */
goto bad_reg;
case 13: /* Process ID. */
switch (op2) {
case 0:
/* Unlike real hardware the qemu TLB uses virtual addresses,
not modified virtual addresses, so this causes a TLB flush.
*/
if (env->cp15.c13_fcse != val)
tlb_flush(env, 1);
env->cp15.c13_fcse = val;
break;
case 1:
/* This changes the ASID, so do a TLB flush. */
if (env->cp15.c13_context != val
&& !arm_feature(env, ARM_FEATURE_MPU))
tlb_flush(env, 0);
env->cp15.c13_context = val;
break;
case 2:
env->cp15.c13_tls1 = val;
break;
case 3:
env->cp15.c13_tls2 = val;
break;
case 4:
env->cp15.c13_tls3 = val;
break;
default:
goto bad_reg;
}
break;
case 14: /* Reserved. */
goto bad_reg;
case 15: /* Implementation specific. */
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
if (op2 == 0 && crm == 1) {
if (env->cp15.c15_cpar != (val & 0x3fff)) {
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
tb_flush(env);
env->cp15.c15_cpar = val & 0x3fff;
}
break;
}
goto bad_reg;
}
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
switch (crm) {
case 0:
break;
case 1: /* Set TI925T configuration. */
env->cp15.c15_ticonfig = val & 0xe7;
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */
ARM_CPUID_TI915T : ARM_CPUID_TI925T;
break;
case 2: /* Set I_max. */
env->cp15.c15_i_max = val;
break;
case 3: /* Set I_min. */
env->cp15.c15_i_min = val;
break;
case 4: /* Set thread-ID. */
env->cp15.c15_threadid = val & 0xffff;
break;
case 8: /* Wait-for-interrupt (deprecated). */
cpu_interrupt(env, CPU_INTERRUPT_HALT);
break;
default:
goto bad_reg;
}
}
break;
}
return;
bad_reg:
/* ??? For debugging only. Should raise illegal instruction exception. */
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
(insn >> 16) & 0xf, crm, op1, op2);
}
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
{
int op1;
int op2;
int crm;
op1 = (insn >> 21) & 7;
op2 = (insn >> 5) & 7;
crm = insn & 0xf;
switch ((insn >> 16) & 0xf) {
case 0: /* ID codes. */
switch (op1) {
case 0:
switch (crm) {
case 0:
switch (op2) {
case 0: /* Device ID. */
return env->cp15.c0_cpuid;
case 1: /* Cache Type. */
return env->cp15.c0_cachetype;
case 2: /* TCM status. */
return 0;
case 3: /* TLB type register. */
return 0; /* No lockable TLB entries. */
case 5: /* CPU ID */
return env->cpu_index;
default:
goto bad_reg;
}
case 1:
if (!arm_feature(env, ARM_FEATURE_V6))
goto bad_reg;
return env->cp15.c0_c1[op2];
case 2:
if (!arm_feature(env, ARM_FEATURE_V6))
goto bad_reg;
return env->cp15.c0_c2[op2];
case 3: case 4: case 5: case 6: case 7:
return 0;
default:
goto bad_reg;
}
case 1:
/* These registers aren't documented on arm11 cores. However
Linux looks at them anyway. */
if (!arm_feature(env, ARM_FEATURE_V6))
goto bad_reg;
if (crm != 0)
goto bad_reg;
if (!arm_feature(env, ARM_FEATURE_V7))
return 0;
switch (op2) {
case 0:
return env->cp15.c0_ccsid[env->cp15.c0_cssel];
case 1:
return env->cp15.c0_clid;
case 7:
return 0;
}
goto bad_reg;
case 2:
if (op2 != 0 || crm != 0)
goto bad_reg;
return env->cp15.c0_cssel;
default:
goto bad_reg;
}
case 1: /* System configuration. */
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0: /* Control register. */
return env->cp15.c1_sys;
case 1: /* Auxiliary control register. */
if (arm_feature(env, ARM_FEATURE_XSCALE))
return env->cp15.c1_xscaleauxcr;
if (!arm_feature(env, ARM_FEATURE_AUXCR))
goto bad_reg;
switch (ARM_CPUID(env)) {
case ARM_CPUID_ARM1026:
return 1;
case ARM_CPUID_ARM1136:
case ARM_CPUID_ARM1136_R2:
return 7;
case ARM_CPUID_ARM11MPCORE:
return 1;
case ARM_CPUID_CORTEXA8:
return 2;
default:
goto bad_reg;
}
case 2: /* Coprocessor access register. */
if (arm_feature(env, ARM_FEATURE_XSCALE))
goto bad_reg;
return env->cp15.c1_coproc;
default:
goto bad_reg;
}
case 2: /* MMU Page table control / MPU cache control. */
if (arm_feature(env, ARM_FEATURE_MPU)) {
switch (op2) {
case 0:
return env->cp15.c2_data;
break;
case 1:
return env->cp15.c2_insn;
break;
default:
goto bad_reg;
}
} else {
switch (op2) {
case 0:
return env->cp15.c2_base0;
case 1:
return env->cp15.c2_base1;
case 2:
return env->cp15.c2_control;
default:
goto bad_reg;
}
}
case 3: /* MMU Domain access control / MPU write buffer control. */
return env->cp15.c3;
case 4: /* Reserved. */
goto bad_reg;
case 5: /* MMU Fault status / MPU access permission. */
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0:
if (arm_feature(env, ARM_FEATURE_MPU))
return simple_mpu_ap_bits(env->cp15.c5_data);
return env->cp15.c5_data;
case 1:
if (arm_feature(env, ARM_FEATURE_MPU))
return simple_mpu_ap_bits(env->cp15.c5_data);
return env->cp15.c5_insn;
case 2:
if (!arm_feature(env, ARM_FEATURE_MPU))
goto bad_reg;
return env->cp15.c5_data;
case 3:
if (!arm_feature(env, ARM_FEATURE_MPU))
goto bad_reg;
return env->cp15.c5_insn;
default:
goto bad_reg;
}
case 6: /* MMU Fault address. */
if (arm_feature(env, ARM_FEATURE_MPU)) {
if (crm >= 8)
goto bad_reg;
return env->cp15.c6_region[crm];
} else {
if (arm_feature(env, ARM_FEATURE_OMAPCP))
op2 = 0;
switch (op2) {
case 0:
return env->cp15.c6_data;
case 1:
if (arm_feature(env, ARM_FEATURE_V6)) {
/* Watchpoint Fault Adrress. */
return 0; /* Not implemented. */
} else {
/* Instruction Fault Adrress. */
/* Arm9 doesn't have an IFAR, but implementing it anyway
shouldn't do any harm. */
return env->cp15.c6_insn;
}
case 2:
if (arm_feature(env, ARM_FEATURE_V6)) {
/* Instruction Fault Adrress. */
return env->cp15.c6_insn;
} else {
goto bad_reg;
}
default:
goto bad_reg;
}
}
case 7: /* Cache control. */
/* FIXME: Should only clear Z flag if destination is r15. */
env->ZF = 0;
return 0;
case 8: /* MMU TLB control. */
goto bad_reg;
case 9: /* Cache lockdown. */
switch (op1) {
case 0: /* L1 cache. */
if (arm_feature(env, ARM_FEATURE_OMAPCP))
return 0;
switch (op2) {
case 0:
return env->cp15.c9_data;
case 1:
return env->cp15.c9_insn;
default:
goto bad_reg;
}
case 1: /* L2 cache */
if (crm != 0)
goto bad_reg;
/* L2 Lockdown and Auxiliary control. */
return 0;
default:
goto bad_reg;
}
case 10: /* MMU TLB lockdown. */
/* ??? TLB lockdown not implemented. */
return 0;
case 11: /* TCM DMA control. */
case 12: /* Reserved. */
goto bad_reg;
case 13: /* Process ID. */
switch (op2) {
case 0:
return env->cp15.c13_fcse;
case 1:
return env->cp15.c13_context;
case 2:
return env->cp15.c13_tls1;
case 3:
return env->cp15.c13_tls2;
case 4:
return env->cp15.c13_tls3;
default:
goto bad_reg;
}
case 14: /* Reserved. */
goto bad_reg;
case 15: /* Implementation specific. */
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
if (op2 == 0 && crm == 1)
return env->cp15.c15_cpar;
goto bad_reg;
}
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
switch (crm) {
case 0:
return 0;
case 1: /* Read TI925T configuration. */
return env->cp15.c15_ticonfig;
case 2: /* Read I_max. */
return env->cp15.c15_i_max;
case 3: /* Read I_min. */
return env->cp15.c15_i_min;
case 4: /* Read thread-ID. */
return env->cp15.c15_threadid;
case 8: /* TI925T_status */
return 0;
}
/* TODO: Peripheral port remap register:
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt
* controller base address at $rn & ~0xfff and map size of
* 0x200 << ($rn & 0xfff), when MMU is off. */
goto bad_reg;
}
return 0;
}
bad_reg:
/* ??? For debugging only. Should raise illegal instruction exception. */
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
(insn >> 16) & 0xf, crm, op1, op2);
return 0;
}
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
{
env->banked_r13[bank_number(mode)] = val;
}
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
{
return env->banked_r13[bank_number(mode)];
}
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg)
{
switch (reg) {
case 0: /* APSR */
return xpsr_read(env) & 0xf8000000;
case 1: /* IAPSR */
return xpsr_read(env) & 0xf80001ff;
case 2: /* EAPSR */
return xpsr_read(env) & 0xff00fc00;
case 3: /* xPSR */
return xpsr_read(env) & 0xff00fdff;
case 5: /* IPSR */
return xpsr_read(env) & 0x000001ff;
case 6: /* EPSR */
return xpsr_read(env) & 0x0700fc00;
case 7: /* IEPSR */
return xpsr_read(env) & 0x0700edff;
case 8: /* MSP */
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
case 9: /* PSP */
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
case 16: /* PRIMASK */
return (env->uncached_cpsr & CPSR_I) != 0;
case 17: /* FAULTMASK */
return (env->uncached_cpsr & CPSR_F) != 0;
case 18: /* BASEPRI */
case 19: /* BASEPRI_MAX */
return env->v7m.basepri;
case 20: /* CONTROL */
return env->v7m.control;
default:
/* ??? For debugging only. */
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
return 0;
}
}
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
{
switch (reg) {
case 0: /* APSR */
xpsr_write(env, val, 0xf8000000);
break;
case 1: /* IAPSR */
xpsr_write(env, val, 0xf8000000);
break;
case 2: /* EAPSR */
xpsr_write(env, val, 0xfe00fc00);
break;
case 3: /* xPSR */
xpsr_write(env, val, 0xfe00fc00);
break;
case 5: /* IPSR */
/* IPSR bits are readonly. */
break;
case 6: /* EPSR */
xpsr_write(env, val, 0x0600fc00);
break;
case 7: /* IEPSR */
xpsr_write(env, val, 0x0600fc00);
break;
case 8: /* MSP */
if (env->v7m.current_sp)
env->v7m.other_sp = val;
else
env->regs[13] = val;
break;
case 9: /* PSP */
if (env->v7m.current_sp)
env->regs[13] = val;
else
env->v7m.other_sp = val;
break;
case 16: /* PRIMASK */
if (val & 1)
env->uncached_cpsr |= CPSR_I;
else
env->uncached_cpsr &= ~CPSR_I;
break;
case 17: /* FAULTMASK */
if (val & 1)
env->uncached_cpsr |= CPSR_F;
else
env->uncached_cpsr &= ~CPSR_F;
break;
case 18: /* BASEPRI */
env->v7m.basepri = val & 0xff;
break;
case 19: /* BASEPRI_MAX */
val &= 0xff;
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
env->v7m.basepri = val;
break;
case 20: /* CONTROL */
env->v7m.control = val & 3;
switch_v7m_sp(env, (val & 2) != 0);
break;
default:
/* ??? For debugging only. */
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
return;
}
}
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum,
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write,
void *opaque)
{
if (cpnum < 0 || cpnum > 14) {
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
return;
}
env->cp[cpnum].cp_read = cp_read;
env->cp[cpnum].cp_write = cp_write;
env->cp[cpnum].opaque = opaque;
}
#endif
/* Note that signed overflow is undefined in C. The following routines are
careful to use unsigned types where modulo arithmetic is required.
Failure to do so _will_ break on newer gcc. */
/* Signed saturating arithmetic. */
/* Perform 16-bit signed saturating addition. */
static inline uint16_t add16_sat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a + b;
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
if (a & 0x8000)
res = 0x8000;
else
res = 0x7fff;
}
return res;
}
/* Perform 8-bit signed saturating addition. */
static inline uint8_t add8_sat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a + b;
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
if (a & 0x80)
res = 0x80;
else
res = 0x7f;
}
return res;
}
/* Perform 16-bit signed saturating subtraction. */
static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a - b;
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
if (a & 0x8000)
res = 0x8000;
else
res = 0x7fff;
}
return res;
}
/* Perform 8-bit signed saturating subtraction. */
static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a - b;
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
if (a & 0x80)
res = 0x80;
else
res = 0x7f;
}
return res;
}
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
#define PFX q
#include "op_addsub.h"
/* Unsigned saturating arithmetic. */
static inline uint16_t add16_usat(uint16_t a, uint16_t b)
{
uint16_t res;
res = a + b;
if (res < a)
res = 0xffff;
return res;
}
static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
{
if (a < b)
return a - b;
else
return 0;
}
static inline uint8_t add8_usat(uint8_t a, uint8_t b)
{
uint8_t res;
res = a + b;
if (res < a)
res = 0xff;
return res;
}
static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
{
if (a < b)
return a - b;
else
return 0;
}
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
#define PFX uq
#include "op_addsub.h"
/* Signed modulo arithmetic. */
#define SARITH16(a, b, n, op) do { \
int32_t sum; \
sum = (int16_t)((uint16_t)(a) op (uint16_t)(b)); \
RESULT(sum, n, 16); \
if (sum >= 0) \
ge |= 3 << (n * 2); \
} while(0)
#define SARITH8(a, b, n, op) do { \
int32_t sum; \
sum = (int8_t)((uint8_t)(a) op (uint8_t)(b)); \
RESULT(sum, n, 8); \
if (sum >= 0) \
ge |= 1 << n; \
} while(0)
#define ADD16(a, b, n) SARITH16(a, b, n, +)
#define SUB16(a, b, n) SARITH16(a, b, n, -)
#define ADD8(a, b, n) SARITH8(a, b, n, +)
#define SUB8(a, b, n) SARITH8(a, b, n, -)
#define PFX s
#define ARITH_GE
#include "op_addsub.h"
/* Unsigned modulo arithmetic. */
#define ADD16(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
RESULT(sum, n, 16); \
if ((sum >> 16) == 1) \
ge |= 3 << (n * 2); \
} while(0)
#define ADD8(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
RESULT(sum, n, 8); \
if ((sum >> 8) == 1) \
ge |= 1 << n; \
} while(0)
#define SUB16(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
RESULT(sum, n, 16); \
if ((sum >> 16) == 0) \
ge |= 3 << (n * 2); \
} while(0)
#define SUB8(a, b, n) do { \
uint32_t sum; \
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
RESULT(sum, n, 8); \
if ((sum >> 8) == 0) \
ge |= 1 << n; \
} while(0)
#define PFX u
#define ARITH_GE
#include "op_addsub.h"
/* Halved signed arithmetic. */
#define ADD16(a, b, n) \
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
#define SUB16(a, b, n) \
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
#define ADD8(a, b, n) \
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
#define SUB8(a, b, n) \
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
#define PFX sh
#include "op_addsub.h"
/* Halved unsigned arithmetic. */
#define ADD16(a, b, n) \
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
#define SUB16(a, b, n) \
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
#define ADD8(a, b, n) \
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
#define SUB8(a, b, n) \
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
#define PFX uh
#include "op_addsub.h"
static inline uint8_t do_usad(uint8_t a, uint8_t b)
{
if (a > b)
return a - b;
else
return b - a;
}
/* Unsigned sum of absolute byte differences. */
uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
{
uint32_t sum;
sum = do_usad(a, b);
sum += do_usad(a >> 8, b >> 8);
sum += do_usad(a >> 16, b >>16);
sum += do_usad(a >> 24, b >> 24);
return sum;
}
/* For ARMv6 SEL instruction. */
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
{
uint32_t mask;
mask = 0;
if (flags & 1)
mask |= 0xff;
if (flags & 2)
mask |= 0xff00;
if (flags & 4)
mask |= 0xff0000;
if (flags & 8)
mask |= 0xff000000;
return (a & mask) | (b & ~mask);
}
uint32_t HELPER(logicq_cc)(uint64_t val)
{
return (val >> 32) | (val != 0);
}
/* VFP support. We follow the convention used for VFP instrunctions:
Single precition routines have a "s" suffix, double precision a
"d" suffix. */
/* Convert host exception flags to vfp form. */
static inline int vfp_exceptbits_from_host(int host_bits)
{
int target_bits = 0;
if (host_bits & float_flag_invalid)
target_bits |= 1;
if (host_bits & float_flag_divbyzero)
target_bits |= 2;
if (host_bits & float_flag_overflow)
target_bits |= 4;
if (host_bits & float_flag_underflow)
target_bits |= 8;
if (host_bits & float_flag_inexact)
target_bits |= 0x10;
return target_bits;
}
uint32_t HELPER(vfp_get_fpscr)(CPUState *env)
{
int i;
uint32_t fpscr;
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
| (env->vfp.vec_len << 16)
| (env->vfp.vec_stride << 20);
i = get_float_exception_flags(&env->vfp.fp_status);
fpscr |= vfp_exceptbits_from_host(i);
return fpscr;
}
/* Convert vfp exception flags to target form. */
static inline int vfp_exceptbits_to_host(int target_bits)
{
int host_bits = 0;
if (target_bits & 1)
host_bits |= float_flag_invalid;
if (target_bits & 2)
host_bits |= float_flag_divbyzero;
if (target_bits & 4)
host_bits |= float_flag_overflow;
if (target_bits & 8)
host_bits |= float_flag_underflow;
if (target_bits & 0x10)
host_bits |= float_flag_inexact;
return host_bits;
}
void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
{
int i;
uint32_t changed;
changed = env->vfp.xregs[ARM_VFP_FPSCR];
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
env->vfp.vec_len = (val >> 16) & 7;
env->vfp.vec_stride = (val >> 20) & 3;
changed ^= val;
if (changed & (3 << 22)) {
i = (val >> 22) & 3;
switch (i) {
case 0:
i = float_round_nearest_even;
break;
case 1:
i = float_round_up;
break;
case 2:
i = float_round_down;
break;
case 3:
i = float_round_to_zero;
break;
}
set_float_rounding_mode(i, &env->vfp.fp_status);
}
if (changed & (1 << 24))
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
if (changed & (1 << 25))
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
i = vfp_exceptbits_to_host((val >> 8) & 0x1f);
set_float_exception_flags(i, &env->vfp.fp_status);
}
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
#define VFP_BINOP(name) \
float32 VFP_HELPER(name, s)(float32 a, float32 b, CPUState *env) \
{ \
return float32_ ## name (a, b, &env->vfp.fp_status); \
} \
float64 VFP_HELPER(name, d)(float64 a, float64 b, CPUState *env) \
{ \
return float64_ ## name (a, b, &env->vfp.fp_status); \
}
VFP_BINOP(add)
VFP_BINOP(sub)
VFP_BINOP(mul)
VFP_BINOP(div)
#undef VFP_BINOP
float32 VFP_HELPER(neg, s)(float32 a)
{
return float32_chs(a);
}
float64 VFP_HELPER(neg, d)(float64 a)
{
return float64_chs(a);
}
float32 VFP_HELPER(abs, s)(float32 a)
{
return float32_abs(a);
}
float64 VFP_HELPER(abs, d)(float64 a)
{
return float64_abs(a);
}
float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env)
{
return float32_sqrt(a, &env->vfp.fp_status);
}
float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env)
{
return float64_sqrt(a, &env->vfp.fp_status);
}
/* XXX: check quiet/signaling case */
#define DO_VFP_cmp(p, type) \
void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \
{ \
uint32_t flags; \
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
case 0: flags = 0x6; break; \
case -1: flags = 0x8; break; \
case 1: flags = 0x2; break; \
default: case 2: flags = 0x3; break; \
} \
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
} \
void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \
{ \
uint32_t flags; \
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
case 0: flags = 0x6; break; \
case -1: flags = 0x8; break; \
case 1: flags = 0x2; break; \
default: case 2: flags = 0x3; break; \
} \
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
}
DO_VFP_cmp(s, float32)
DO_VFP_cmp(d, float64)
#undef DO_VFP_cmp
/* Helper routines to perform bitwise copies between float and int. */
static inline float32 vfp_itos(uint32_t i)
{
union {
uint32_t i;
float32 s;
} v;
v.i = i;
return v.s;
}
static inline uint32_t vfp_stoi(float32 s)
{
union {
uint32_t i;
float32 s;
} v;
v.s = s;
return v.i;
}
static inline float64 vfp_itod(uint64_t i)
{
union {
uint64_t i;
float64 d;
} v;
v.i = i;
return v.d;
}
static inline uint64_t vfp_dtoi(float64 d)
{
union {
uint64_t i;
float64 d;
} v;
v.d = d;
return v.i;
}
/* Integer to float conversion. */
float32 VFP_HELPER(uito, s)(float32 x, CPUState *env)
{
return uint32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
}
float64 VFP_HELPER(uito, d)(float32 x, CPUState *env)
{
return uint32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
}
float32 VFP_HELPER(sito, s)(float32 x, CPUState *env)
{
return int32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
}
float64 VFP_HELPER(sito, d)(float32 x, CPUState *env)
{
return int32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
}
/* Float to integer conversion. */
float32 VFP_HELPER(toui, s)(float32 x, CPUState *env)
{
return vfp_itos(float32_to_uint32(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(toui, d)(float64 x, CPUState *env)
{
return vfp_itos(float64_to_uint32(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(tosi, s)(float32 x, CPUState *env)
{
return vfp_itos(float32_to_int32(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(tosi, d)(float64 x, CPUState *env)
{
return vfp_itos(float64_to_int32(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(touiz, s)(float32 x, CPUState *env)
{
return vfp_itos(float32_to_uint32_round_to_zero(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(touiz, d)(float64 x, CPUState *env)
{
return vfp_itos(float64_to_uint32_round_to_zero(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(tosiz, s)(float32 x, CPUState *env)
{
return vfp_itos(float32_to_int32_round_to_zero(x, &env->vfp.fp_status));
}
float32 VFP_HELPER(tosiz, d)(float64 x, CPUState *env)
{
return vfp_itos(float64_to_int32_round_to_zero(x, &env->vfp.fp_status));
}
/* floating point conversion */
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env)
{
return float32_to_float64(x, &env->vfp.fp_status);
}
float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env)
{
return float64_to_float32(x, &env->vfp.fp_status);
}
/* VFP3 fixed point conversion. */
#define VFP_CONV_FIX(name, p, ftype, itype, sign) \
ftype VFP_HELPER(name##to, p)(ftype x, uint32_t shift, CPUState *env) \
{ \
ftype tmp; \
tmp = sign##int32_to_##ftype ((itype)vfp_##p##toi(x), \
&env->vfp.fp_status); \
return ftype##_scalbn(tmp, -(int)shift, &env->vfp.fp_status); \
} \
ftype VFP_HELPER(to##name, p)(ftype x, uint32_t shift, CPUState *env) \
{ \
ftype tmp; \
tmp = ftype##_scalbn(x, shift, &env->vfp.fp_status); \
return vfp_ito##p((itype)ftype##_to_##sign##int32_round_to_zero(tmp, \
&env->vfp.fp_status)); \
}
VFP_CONV_FIX(sh, d, float64, int16, )
VFP_CONV_FIX(sl, d, float64, int32, )
VFP_CONV_FIX(uh, d, float64, uint16, u)
VFP_CONV_FIX(ul, d, float64, uint32, u)
VFP_CONV_FIX(sh, s, float32, int16, )
VFP_CONV_FIX(sl, s, float32, int32, )
VFP_CONV_FIX(uh, s, float32, uint16, u)
VFP_CONV_FIX(ul, s, float32, uint32, u)
#undef VFP_CONV_FIX
float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 two = int32_to_float32(2, s);
return float32_sub(two, float32_mul(a, b, s), s);
}
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 three = int32_to_float32(3, s);
return float32_sub(three, float32_mul(a, b, s), s);
}
/* NEON helpers. */
/* TODO: The architecture specifies the value that the estimate functions
should return. We return the exact reciprocal/root instead. */
float32 HELPER(recpe_f32)(float32 a, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 one = int32_to_float32(1, s);
return float32_div(one, a, s);
}
float32 HELPER(rsqrte_f32)(float32 a, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 one = int32_to_float32(1, s);
return float32_div(one, float32_sqrt(a, s), s);
}
uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 tmp;
tmp = int32_to_float32(a, s);
tmp = float32_scalbn(tmp, -32, s);
tmp = helper_recpe_f32(tmp, env);
tmp = float32_scalbn(tmp, 31, s);
return float32_to_int32(tmp, s);
}
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env)
{
float_status *s = &env->vfp.fp_status;
float32 tmp;
tmp = int32_to_float32(a, s);
tmp = float32_scalbn(tmp, -32, s);
tmp = helper_rsqrte_f32(tmp, env);
tmp = float32_scalbn(tmp, 31, s);
return float32_to_int32(tmp, s);
}
void HELPER(set_teecr)(CPUState *env, uint32_t val)
{
val &= 1;
if (env->teecr != val) {
env->teecr = val;
tb_flush(env);
}
}
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