541 lines
14 KiB
C
541 lines
14 KiB
C
/*
|
|
* Motorola ColdFire MCF5206 SoC embedded peripheral emulation.
|
|
*
|
|
* Copyright (c) 2007 CodeSourcery.
|
|
*
|
|
* This code is licenced under the GPL
|
|
*/
|
|
#include "hw.h"
|
|
#include "mcf.h"
|
|
#include "qemu-timer.h"
|
|
#include "sysemu.h"
|
|
|
|
/* General purpose timer module. */
|
|
typedef struct {
|
|
uint16_t tmr;
|
|
uint16_t trr;
|
|
uint16_t tcr;
|
|
uint16_t ter;
|
|
ptimer_state *timer;
|
|
qemu_irq irq;
|
|
int irq_state;
|
|
} m5206_timer_state;
|
|
|
|
#define TMR_RST 0x01
|
|
#define TMR_CLK 0x06
|
|
#define TMR_FRR 0x08
|
|
#define TMR_ORI 0x10
|
|
#define TMR_OM 0x20
|
|
#define TMR_CE 0xc0
|
|
|
|
#define TER_CAP 0x01
|
|
#define TER_REF 0x02
|
|
|
|
static void m5206_timer_update(m5206_timer_state *s)
|
|
{
|
|
if ((s->tmr & TMR_ORI) != 0 && (s->ter & TER_REF))
|
|
qemu_irq_raise(s->irq);
|
|
else
|
|
qemu_irq_lower(s->irq);
|
|
}
|
|
|
|
static void m5206_timer_reset(m5206_timer_state *s)
|
|
{
|
|
s->tmr = 0;
|
|
s->trr = 0;
|
|
}
|
|
|
|
static void m5206_timer_recalibrate(m5206_timer_state *s)
|
|
{
|
|
int prescale;
|
|
int mode;
|
|
|
|
ptimer_stop(s->timer);
|
|
|
|
if ((s->tmr & TMR_RST) == 0)
|
|
return;
|
|
|
|
prescale = (s->tmr >> 8) + 1;
|
|
mode = (s->tmr >> 1) & 3;
|
|
if (mode == 2)
|
|
prescale *= 16;
|
|
|
|
if (mode == 3 || mode == 0)
|
|
hw_error("m5206_timer: mode %d not implemented\n", mode);
|
|
if ((s->tmr & TMR_FRR) == 0)
|
|
hw_error("m5206_timer: free running mode not implemented\n");
|
|
|
|
/* Assume 66MHz system clock. */
|
|
ptimer_set_freq(s->timer, 66000000 / prescale);
|
|
|
|
ptimer_set_limit(s->timer, s->trr, 0);
|
|
|
|
ptimer_run(s->timer, 0);
|
|
}
|
|
|
|
static void m5206_timer_trigger(void *opaque)
|
|
{
|
|
m5206_timer_state *s = (m5206_timer_state *)opaque;
|
|
s->ter |= TER_REF;
|
|
m5206_timer_update(s);
|
|
}
|
|
|
|
static uint32_t m5206_timer_read(m5206_timer_state *s, uint32_t addr)
|
|
{
|
|
switch (addr) {
|
|
case 0:
|
|
return s->tmr;
|
|
case 4:
|
|
return s->trr;
|
|
case 8:
|
|
return s->tcr;
|
|
case 0xc:
|
|
return s->trr - ptimer_get_count(s->timer);
|
|
case 0x11:
|
|
return s->ter;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void m5206_timer_write(m5206_timer_state *s, uint32_t addr, uint32_t val)
|
|
{
|
|
switch (addr) {
|
|
case 0:
|
|
if ((s->tmr & TMR_RST) != 0 && (val & TMR_RST) == 0) {
|
|
m5206_timer_reset(s);
|
|
}
|
|
s->tmr = val;
|
|
m5206_timer_recalibrate(s);
|
|
break;
|
|
case 4:
|
|
s->trr = val;
|
|
m5206_timer_recalibrate(s);
|
|
break;
|
|
case 8:
|
|
s->tcr = val;
|
|
break;
|
|
case 0xc:
|
|
ptimer_set_count(s->timer, val);
|
|
break;
|
|
case 0x11:
|
|
s->ter &= ~val;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
m5206_timer_update(s);
|
|
}
|
|
|
|
static m5206_timer_state *m5206_timer_init(qemu_irq irq)
|
|
{
|
|
m5206_timer_state *s;
|
|
QEMUBH *bh;
|
|
|
|
s = (m5206_timer_state *)qemu_mallocz(sizeof(m5206_timer_state));
|
|
bh = qemu_bh_new(m5206_timer_trigger, s);
|
|
s->timer = ptimer_init(bh);
|
|
s->irq = irq;
|
|
m5206_timer_reset(s);
|
|
return s;
|
|
}
|
|
|
|
/* System Integration Module. */
|
|
|
|
typedef struct {
|
|
CPUState *env;
|
|
m5206_timer_state *timer[2];
|
|
void *uart[2];
|
|
uint8_t scr;
|
|
uint8_t icr[14];
|
|
uint16_t imr; /* 1 == interrupt is masked. */
|
|
uint16_t ipr;
|
|
uint8_t rsr;
|
|
uint8_t swivr;
|
|
uint8_t par;
|
|
/* Include the UART vector registers here. */
|
|
uint8_t uivr[2];
|
|
} m5206_mbar_state;
|
|
|
|
/* Interrupt controller. */
|
|
|
|
static int m5206_find_pending_irq(m5206_mbar_state *s)
|
|
{
|
|
int level;
|
|
int vector;
|
|
uint16_t active;
|
|
int i;
|
|
|
|
level = 0;
|
|
vector = 0;
|
|
active = s->ipr & ~s->imr;
|
|
if (!active)
|
|
return 0;
|
|
|
|
for (i = 1; i < 14; i++) {
|
|
if (active & (1 << i)) {
|
|
if ((s->icr[i] & 0x1f) > level) {
|
|
level = s->icr[i] & 0x1f;
|
|
vector = i;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (level < 4)
|
|
vector = 0;
|
|
|
|
return vector;
|
|
}
|
|
|
|
static void m5206_mbar_update(m5206_mbar_state *s)
|
|
{
|
|
int irq;
|
|
int vector;
|
|
int level;
|
|
|
|
irq = m5206_find_pending_irq(s);
|
|
if (irq) {
|
|
int tmp;
|
|
tmp = s->icr[irq];
|
|
level = (tmp >> 2) & 7;
|
|
if (tmp & 0x80) {
|
|
/* Autovector. */
|
|
vector = 24 + level;
|
|
} else {
|
|
switch (irq) {
|
|
case 8: /* SWT */
|
|
vector = s->swivr;
|
|
break;
|
|
case 12: /* UART1 */
|
|
vector = s->uivr[0];
|
|
break;
|
|
case 13: /* UART2 */
|
|
vector = s->uivr[1];
|
|
break;
|
|
default:
|
|
/* Unknown vector. */
|
|
fprintf(stderr, "Unhandled vector for IRQ %d\n", irq);
|
|
vector = 0xf;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
level = 0;
|
|
vector = 0;
|
|
}
|
|
m68k_set_irq_level(s->env, level, vector);
|
|
}
|
|
|
|
static void m5206_mbar_set_irq(void *opaque, int irq, int level)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
if (level) {
|
|
s->ipr |= 1 << irq;
|
|
} else {
|
|
s->ipr &= ~(1 << irq);
|
|
}
|
|
m5206_mbar_update(s);
|
|
}
|
|
|
|
/* System Integration Module. */
|
|
|
|
static void m5206_mbar_reset(m5206_mbar_state *s)
|
|
{
|
|
s->scr = 0xc0;
|
|
s->icr[1] = 0x04;
|
|
s->icr[2] = 0x08;
|
|
s->icr[3] = 0x0c;
|
|
s->icr[4] = 0x10;
|
|
s->icr[5] = 0x14;
|
|
s->icr[6] = 0x18;
|
|
s->icr[7] = 0x1c;
|
|
s->icr[8] = 0x1c;
|
|
s->icr[9] = 0x80;
|
|
s->icr[10] = 0x80;
|
|
s->icr[11] = 0x80;
|
|
s->icr[12] = 0x00;
|
|
s->icr[13] = 0x00;
|
|
s->imr = 0x3ffe;
|
|
s->rsr = 0x80;
|
|
s->swivr = 0x0f;
|
|
s->par = 0;
|
|
}
|
|
|
|
static uint32_t m5206_mbar_read(m5206_mbar_state *s, uint32_t offset)
|
|
{
|
|
if (offset >= 0x100 && offset < 0x120) {
|
|
return m5206_timer_read(s->timer[0], offset - 0x100);
|
|
} else if (offset >= 0x120 && offset < 0x140) {
|
|
return m5206_timer_read(s->timer[1], offset - 0x120);
|
|
} else if (offset >= 0x140 && offset < 0x160) {
|
|
return mcf_uart_read(s->uart[0], offset - 0x140);
|
|
} else if (offset >= 0x180 && offset < 0x1a0) {
|
|
return mcf_uart_read(s->uart[1], offset - 0x180);
|
|
}
|
|
switch (offset) {
|
|
case 0x03: return s->scr;
|
|
case 0x14 ... 0x20: return s->icr[offset - 0x13];
|
|
case 0x36: return s->imr;
|
|
case 0x3a: return s->ipr;
|
|
case 0x40: return s->rsr;
|
|
case 0x41: return 0;
|
|
case 0x42: return s->swivr;
|
|
case 0x50:
|
|
/* DRAM mask register. */
|
|
/* FIXME: currently hardcoded to 128Mb. */
|
|
{
|
|
uint32_t mask = ~0;
|
|
while (mask > ram_size)
|
|
mask >>= 1;
|
|
return mask & 0x0ffe0000;
|
|
}
|
|
case 0x5c: return 1; /* DRAM bank 1 empty. */
|
|
case 0xcb: return s->par;
|
|
case 0x170: return s->uivr[0];
|
|
case 0x1b0: return s->uivr[1];
|
|
}
|
|
hw_error("Bad MBAR read offset 0x%x", (int)offset);
|
|
return 0;
|
|
}
|
|
|
|
static void m5206_mbar_write(m5206_mbar_state *s, uint32_t offset,
|
|
uint32_t value)
|
|
{
|
|
if (offset >= 0x100 && offset < 0x120) {
|
|
m5206_timer_write(s->timer[0], offset - 0x100, value);
|
|
return;
|
|
} else if (offset >= 0x120 && offset < 0x140) {
|
|
m5206_timer_write(s->timer[1], offset - 0x120, value);
|
|
return;
|
|
} else if (offset >= 0x140 && offset < 0x160) {
|
|
mcf_uart_write(s->uart[0], offset - 0x140, value);
|
|
return;
|
|
} else if (offset >= 0x180 && offset < 0x1a0) {
|
|
mcf_uart_write(s->uart[1], offset - 0x180, value);
|
|
return;
|
|
}
|
|
switch (offset) {
|
|
case 0x03:
|
|
s->scr = value;
|
|
break;
|
|
case 0x14 ... 0x20:
|
|
s->icr[offset - 0x13] = value;
|
|
m5206_mbar_update(s);
|
|
break;
|
|
case 0x36:
|
|
s->imr = value;
|
|
m5206_mbar_update(s);
|
|
break;
|
|
case 0x40:
|
|
s->rsr &= ~value;
|
|
break;
|
|
case 0x41:
|
|
/* TODO: implement watchdog. */
|
|
break;
|
|
case 0x42:
|
|
s->swivr = value;
|
|
break;
|
|
case 0xcb:
|
|
s->par = value;
|
|
break;
|
|
case 0x170:
|
|
s->uivr[0] = value;
|
|
break;
|
|
case 0x178: case 0x17c: case 0x1c8: case 0x1bc:
|
|
/* Not implemented: UART Output port bits. */
|
|
break;
|
|
case 0x1b0:
|
|
s->uivr[1] = value;
|
|
break;
|
|
default:
|
|
hw_error("Bad MBAR write offset 0x%x", (int)offset);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Internal peripherals use a variety of register widths.
|
|
This lookup table allows a single routine to handle all of them. */
|
|
static const int m5206_mbar_width[] =
|
|
{
|
|
/* 000-040 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2,
|
|
/* 040-080 */ 1, 2, 2, 2, 4, 1, 2, 4, 1, 2, 4, 2, 2, 4, 2, 2,
|
|
/* 080-0c0 */ 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 2, 4,
|
|
/* 0c0-100 */ 2, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 100-140 */ 2, 2, 2, 2, 1, 0, 0, 0, 2, 2, 2, 2, 1, 0, 0, 0,
|
|
/* 140-180 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* 180-1c0 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* 1c0-200 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
};
|
|
|
|
static uint32_t m5206_mbar_readw(void *opaque, target_phys_addr_t offset);
|
|
static uint32_t m5206_mbar_readl(void *opaque, target_phys_addr_t offset);
|
|
|
|
static uint32_t m5206_mbar_readb(void *opaque, target_phys_addr_t offset)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR read offset 0x%x", (int)offset);
|
|
}
|
|
if (m5206_mbar_width[offset >> 2] > 1) {
|
|
uint16_t val;
|
|
val = m5206_mbar_readw(opaque, offset & ~1);
|
|
if ((offset & 1) == 0) {
|
|
val >>= 8;
|
|
}
|
|
return val & 0xff;
|
|
}
|
|
return m5206_mbar_read(s, offset);
|
|
}
|
|
|
|
static uint32_t m5206_mbar_readw(void *opaque, target_phys_addr_t offset)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
int width;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR read offset 0x%x", (int)offset);
|
|
}
|
|
width = m5206_mbar_width[offset >> 2];
|
|
if (width > 2) {
|
|
uint32_t val;
|
|
val = m5206_mbar_readl(opaque, offset & ~3);
|
|
if ((offset & 3) == 0)
|
|
val >>= 16;
|
|
return val & 0xffff;
|
|
} else if (width < 2) {
|
|
uint16_t val;
|
|
val = m5206_mbar_readb(opaque, offset) << 8;
|
|
val |= m5206_mbar_readb(opaque, offset + 1);
|
|
return val;
|
|
}
|
|
return m5206_mbar_read(s, offset);
|
|
}
|
|
|
|
static uint32_t m5206_mbar_readl(void *opaque, target_phys_addr_t offset)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
int width;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR read offset 0x%x", (int)offset);
|
|
}
|
|
width = m5206_mbar_width[offset >> 2];
|
|
if (width < 4) {
|
|
uint32_t val;
|
|
val = m5206_mbar_readw(opaque, offset) << 16;
|
|
val |= m5206_mbar_readw(opaque, offset + 2);
|
|
return val;
|
|
}
|
|
return m5206_mbar_read(s, offset);
|
|
}
|
|
|
|
static void m5206_mbar_writew(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value);
|
|
static void m5206_mbar_writel(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value);
|
|
|
|
static void m5206_mbar_writeb(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
int width;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR write offset 0x%x", (int)offset);
|
|
}
|
|
width = m5206_mbar_width[offset >> 2];
|
|
if (width > 1) {
|
|
uint32_t tmp;
|
|
tmp = m5206_mbar_readw(opaque, offset & ~1);
|
|
if (offset & 1) {
|
|
tmp = (tmp & 0xff00) | value;
|
|
} else {
|
|
tmp = (tmp & 0x00ff) | (value << 8);
|
|
}
|
|
m5206_mbar_writew(opaque, offset & ~1, tmp);
|
|
return;
|
|
}
|
|
m5206_mbar_write(s, offset, value);
|
|
}
|
|
|
|
static void m5206_mbar_writew(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
int width;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR write offset 0x%x", (int)offset);
|
|
}
|
|
width = m5206_mbar_width[offset >> 2];
|
|
if (width > 2) {
|
|
uint32_t tmp;
|
|
tmp = m5206_mbar_readl(opaque, offset & ~3);
|
|
if (offset & 3) {
|
|
tmp = (tmp & 0xffff0000) | value;
|
|
} else {
|
|
tmp = (tmp & 0x0000ffff) | (value << 16);
|
|
}
|
|
m5206_mbar_writel(opaque, offset & ~3, tmp);
|
|
return;
|
|
} else if (width < 2) {
|
|
m5206_mbar_writeb(opaque, offset, value >> 8);
|
|
m5206_mbar_writeb(opaque, offset + 1, value & 0xff);
|
|
return;
|
|
}
|
|
m5206_mbar_write(s, offset, value);
|
|
}
|
|
|
|
static void m5206_mbar_writel(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value)
|
|
{
|
|
m5206_mbar_state *s = (m5206_mbar_state *)opaque;
|
|
int width;
|
|
offset &= 0x3ff;
|
|
if (offset > 0x200) {
|
|
hw_error("Bad MBAR write offset 0x%x", (int)offset);
|
|
}
|
|
width = m5206_mbar_width[offset >> 2];
|
|
if (width < 4) {
|
|
m5206_mbar_writew(opaque, offset, value >> 16);
|
|
m5206_mbar_writew(opaque, offset + 2, value & 0xffff);
|
|
return;
|
|
}
|
|
m5206_mbar_write(s, offset, value);
|
|
}
|
|
|
|
static CPUReadMemoryFunc *m5206_mbar_readfn[] = {
|
|
m5206_mbar_readb,
|
|
m5206_mbar_readw,
|
|
m5206_mbar_readl
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *m5206_mbar_writefn[] = {
|
|
m5206_mbar_writeb,
|
|
m5206_mbar_writew,
|
|
m5206_mbar_writel
|
|
};
|
|
|
|
qemu_irq *mcf5206_init(uint32_t base, CPUState *env)
|
|
{
|
|
m5206_mbar_state *s;
|
|
qemu_irq *pic;
|
|
int iomemtype;
|
|
|
|
s = (m5206_mbar_state *)qemu_mallocz(sizeof(m5206_mbar_state));
|
|
iomemtype = cpu_register_io_memory(0, m5206_mbar_readfn,
|
|
m5206_mbar_writefn, s);
|
|
cpu_register_physical_memory(base, 0x00001000, iomemtype);
|
|
|
|
pic = qemu_allocate_irqs(m5206_mbar_set_irq, s, 14);
|
|
s->timer[0] = m5206_timer_init(pic[9]);
|
|
s->timer[1] = m5206_timer_init(pic[10]);
|
|
s->uart[0] = mcf_uart_init(pic[12], serial_hds[0]);
|
|
s->uart[1] = mcf_uart_init(pic[13], serial_hds[1]);
|
|
s->env = env;
|
|
|
|
m5206_mbar_reset(s);
|
|
return pic;
|
|
}
|