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Enable faults for unassigned memory accesses and unimplemented ASIs 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2824 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2007-05-17 19:30:10 +00:00
parent 4edebb0e8e
commit 6c36d3fa86
5 changed files with 126 additions and 23 deletions
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4
exec-all.h
View File

@ -593,7 +593,11 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
}
pd = env->tlb_table[is_user][index].addr_code & ~TARGET_PAGE_MASK;
if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
#ifdef TARGET_SPARC
do_unassigned_access(addr, 0, 1, 0);
#else
cpu_abort(env, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);
#endif
}
return addr + env->tlb_table[is_user][index].addend - (unsigned long)phys_ram_base;
}

10
exec.c
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@ -1957,11 +1957,10 @@ void qemu_ram_free(ram_addr_t addr)
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem read 0x%08x\n", (int)addr);
printf("Unassigned mem read " TARGET_FMT_lx "\n", addr);
#endif
#ifdef TARGET_SPARC
// Not enabled yet because of bugs in gdbstub etc.
//raise_exception(TT_DATA_ACCESS);
do_unassigned_access(addr, 0, 0, 0);
#endif
return 0;
}
@ -1969,11 +1968,10 @@ static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr)
static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem write 0x%08x = 0x%x\n", (int)addr, val);
printf("Unassigned mem write " TARGET_FMT_lx " = 0x%x\n", addr, val);
#endif
#ifdef TARGET_SPARC
// Not enabled yet because of bugs in gdbstub etc.
//raise_exception(TT_DATA_ACCESS);
do_unassigned_access(addr, 1, 0, 0);
#endif
}

2
target-sparc/cpu.h
View File

@ -290,6 +290,8 @@ void cpu_set_cwp(CPUSPARCState *env1, int new_cwp);
int cpu_sparc_signal_handler(int host_signum, void *pinfo, void *puc);
void raise_exception(int tt);
void do_unassigned_access(target_ulong addr, int is_write, int is_exec,
int is_asi);
#include "cpu-all.h"

131
target-sparc/op_helper.c
View File

@ -3,6 +3,7 @@
//#define DEBUG_PCALL
//#define DEBUG_MMU
//#define DEBUG_UNALIGNED
//#define DEBUG_UNASSIGNED
void raise_exception(int tt)
{
@ -151,6 +152,8 @@ void helper_ld_asi(int asi, int size, int sign)
uint32_t ret = 0;
switch (asi) {
case 2: /* SuperSparc MXCC registers */
break;
case 3: /* MMU probe */
{
int mmulev;
@ -179,7 +182,30 @@ void helper_ld_asi(int asi, int size, int sign)
#endif
}
break;
case 0x20 ... 0x2f: /* MMU passthrough */
case 9: /* Supervisor code access */
switch(size) {
case 1:
ret = ldub_code(T0);
break;
case 2:
ret = lduw_code(T0 & ~1);
break;
default:
case 4:
ret = ldl_code(T0 & ~3);
break;
case 8:
ret = ldl_code(T0 & ~3);
T0 = ldl_code((T0 + 4) & ~3);
break;
}
break;
case 0xc: /* I-cache tag */
case 0xd: /* I-cache data */
case 0xe: /* D-cache tag */
case 0xf: /* D-cache data */
break;
case 0x20: /* MMU passthrough */
switch(size) {
case 1:
ret = ldub_phys(T0);
@ -197,7 +223,9 @@ void helper_ld_asi(int asi, int size, int sign)
break;
}
break;
case 0x21 ... 0x2f: /* MMU passthrough, unassigned */
default:
do_unassigned_access(T0, 0, 0, 1);
ret = 0;
break;
}
@ -207,6 +235,8 @@ void helper_ld_asi(int asi, int size, int sign)
void helper_st_asi(int asi, int size, int sign)
{
switch(asi) {
case 2: /* SuperSparc MXCC registers */
break;
case 3: /* MMU flush */
{
int mmulev;
@ -271,18 +301,28 @@ void helper_st_asi(int asi, int size, int sign)
#endif
return;
}
case 0xc: /* I-cache tag */
case 0xd: /* I-cache data */
case 0xe: /* D-cache tag */
case 0xf: /* D-cache data */
case 0x10: /* I/D-cache flush page */
case 0x11: /* I/D-cache flush segment */
case 0x12: /* I/D-cache flush region */
case 0x13: /* I/D-cache flush context */
case 0x14: /* I/D-cache flush user */
break;
case 0x17: /* Block copy, sta access */
{
// value (T1) = src
// address (T0) = dst
// copy 32 bytes
uint32_t src = T1, dst = T0;
uint8_t temp[32];
unsigned int i;
uint32_t src = T1 & ~3, dst = T0 & ~3, temp;
tswap32s(&src);
cpu_physical_memory_read(src, (void *) &temp, 32);
cpu_physical_memory_write(dst, (void *) &temp, 32);
for (i = 0; i < 32; i += 4, src += 4, dst += 4) {
temp = ldl_kernel(src);
stl_kernel(dst, temp);
}
}
return;
case 0x1f: /* Block fill, stda access */
@ -290,19 +330,17 @@ void helper_st_asi(int asi, int size, int sign)
// value (T1, T2)
// address (T0) = dst
// fill 32 bytes
int i;
uint32_t dst = T0;
uint64_t val;
val = (((uint64_t)T1) << 32) | T2;
tswap64s(&val);
unsigned int i;
uint32_t dst = T0 & 7;
uint64_t val;
for (i = 0; i < 32; i += 8, dst += 8) {
cpu_physical_memory_write(dst, (void *) &val, 8);
}
val = (((uint64_t)T1) << 32) | T2;
for (i = 0; i < 32; i += 8, dst += 8)
stq_kernel(dst, val);
}
return;
case 0x20 ... 0x2f: /* MMU passthrough */
case 0x20: /* MMU passthrough */
{
switch(size) {
case 1:
@ -322,7 +360,14 @@ void helper_st_asi(int asi, int size, int sign)
}
}
return;
case 0x31: /* Ross RT620 I-cache flush */
case 0x36: /* I-cache flash clear */
case 0x37: /* D-cache flash clear */
break;
case 9: /* Supervisor code access, XXX */
case 0x21 ... 0x2f: /* MMU passthrough, unassigned */
default:
do_unassigned_access(T0, 1, 0, 1);
return;
}
}
@ -441,6 +486,7 @@ void helper_ld_asi(int asi, int size, int sign)
case 0x5f: // D-MMU demap, WO
case 0x77: // Interrupt vector, WO
default:
do_unassigned_access(T0, 0, 0, 1);
ret = 0;
break;
}
@ -656,6 +702,7 @@ void helper_st_asi(int asi, int size, int sign)
case 0x8a: // Primary no-fault LE, RO
case 0x8b: // Secondary no-fault LE, RO
default:
do_unassigned_access(T0, 1, 0, 1);
return;
}
}
@ -986,3 +1033,53 @@ void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr)
}
#endif
#ifndef TARGET_SPARC64
void do_unassigned_access(target_ulong addr, int is_write, int is_exec,
int is_asi)
{
CPUState *saved_env;
/* XXX: hack to restore env in all cases, even if not called from
generated code */
saved_env = env;
env = cpu_single_env;
if (env->mmuregs[3]) /* Fault status register */
env->mmuregs[3] = 1; /* overflow (not read before another fault) */
if (is_asi)
env->mmuregs[3] |= 1 << 16;
if (env->psrs)
env->mmuregs[3] |= 1 << 5;
if (is_exec)
env->mmuregs[3] |= 1 << 6;
if (is_write)
env->mmuregs[3] |= 1 << 7;
env->mmuregs[3] |= (5 << 2) | 2;
env->mmuregs[4] = addr; /* Fault address register */
if ((env->mmuregs[0] & MMU_E) && !(env->mmuregs[0] & MMU_NF)) {
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem access to " TARGET_FMT_lx " from " TARGET_FMT_lx
"\n", addr, env->pc);
#endif
raise_exception(TT_DATA_ACCESS);
}
env = saved_env;
}
#else
void do_unassigned_access(target_ulong addr, int is_write, int is_exec,
int is_asi)
{
#ifdef DEBUG_UNASSIGNED
CPUState *saved_env;
/* XXX: hack to restore env in all cases, even if not called from
generated code */
saved_env = env;
env = cpu_single_env;
printf("Unassigned mem access to " TARGET_FMT_lx " from " TARGET_FMT_lx "\n",
addr, env->pc);
env = saved_env;
#endif
raise_exception(TT_DATA_ACCESS);
}
#endif

2
target-sparc/translate.c
View File

@ -3494,6 +3494,8 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
if (get_physical_address(env, &phys_addr, &prot, &access_index, addr, 2, 0) != 0)
if (get_physical_address(env, &phys_addr, &prot, &access_index, addr, 0, 0) != 0)
return -1;
if (cpu_get_physical_page_desc(phys_addr) == IO_MEM_UNASSIGNED)
return -1;
return phys_addr;
}
#endif