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/*
* Status and system control registers for ARM RealView/Versatile boards.
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GPL.
*/
#include "sysbus.h"
#include "primecell.h"
#include "sysemu.h"
#define LOCK_VALUE 0xa05f
typedef struct {
SysBusDevice busdev;
uint32_t sys_id;
uint32_t leds;
uint16_t lockval;
uint32_t cfgdata1;
uint32_t cfgdata2;
uint32_t flags;
uint32_t nvflags;
uint32_t resetlevel;
} arm_sysctl_state;
static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset)
{
arm_sysctl_state *s = (arm_sysctl_state *)opaque;
switch (offset) {
case 0x00: /* ID */
return s->sys_id;
case 0x04: /* SW */
/* General purpose hardware switches.
We don't have a useful way of exposing these to the user. */
return 0;
case 0x08: /* LED */
return s->leds;
case 0x20: /* LOCK */
return s->lockval;
case 0x0c: /* OSC0 */
case 0x10: /* OSC1 */
case 0x14: /* OSC2 */
case 0x18: /* OSC3 */
case 0x1c: /* OSC4 */
case 0x24: /* 100HZ */
/* ??? Implement these. */
return 0;
case 0x28: /* CFGDATA1 */
return s->cfgdata1;
case 0x2c: /* CFGDATA2 */
return s->cfgdata2;
case 0x30: /* FLAGS */
return s->flags;
case 0x38: /* NVFLAGS */
return s->nvflags;
case 0x40: /* RESETCTL */
return s->resetlevel;
case 0x44: /* PCICTL */
return 1;
case 0x48: /* MCI */
return 0;
case 0x4c: /* FLASH */
return 0;
case 0x50: /* CLCD */
return 0x1000;
case 0x54: /* CLCDSER */
return 0;
case 0x58: /* BOOTCS */
return 0;
case 0x5c: /* 24MHz */
/* ??? not implemented. */
return 0;
case 0x60: /* MISC */
return 0;
case 0x84: /* PROCID0 */
/* ??? Don't know what the proper value for the core tile ID is. */
return 0x02000000;
case 0x88: /* PROCID1 */
return 0xff000000;
case 0x64: /* DMAPSR0 */
case 0x68: /* DMAPSR1 */
case 0x6c: /* DMAPSR2 */
case 0x70: /* IOSEL */
case 0x74: /* PLDCTL */
case 0x80: /* BUSID */
case 0x8c: /* OSCRESET0 */
case 0x90: /* OSCRESET1 */
case 0x94: /* OSCRESET2 */
case 0x98: /* OSCRESET3 */
case 0x9c: /* OSCRESET4 */
case 0xc0: /* SYS_TEST_OSC0 */
case 0xc4: /* SYS_TEST_OSC1 */
case 0xc8: /* SYS_TEST_OSC2 */
case 0xcc: /* SYS_TEST_OSC3 */
case 0xd0: /* SYS_TEST_OSC4 */
return 0;
default:
printf ("arm_sysctl_read: Bad register offset 0x%x\n", (int)offset);
return 0;
}
}
static void arm_sysctl_write(void *opaque, target_phys_addr_t offset,
uint32_t val)
{
arm_sysctl_state *s = (arm_sysctl_state *)opaque;
switch (offset) {
case 0x08: /* LED */
s->leds = val;
case 0x0c: /* OSC0 */
case 0x10: /* OSC1 */
case 0x14: /* OSC2 */
case 0x18: /* OSC3 */
case 0x1c: /* OSC4 */
/* ??? */
break;
case 0x20: /* LOCK */
if (val == LOCK_VALUE)
s->lockval = val;
else
s->lockval = val & 0x7fff;
break;
case 0x28: /* CFGDATA1 */
/* ??? Need to implement this. */
s->cfgdata1 = val;
break;
case 0x2c: /* CFGDATA2 */
/* ??? Need to implement this. */
s->cfgdata2 = val;
break;
case 0x30: /* FLAGSSET */
s->flags |= val;
break;
case 0x34: /* FLAGSCLR */
s->flags &= ~val;
break;
case 0x38: /* NVFLAGSSET */
s->nvflags |= val;
break;
case 0x3c: /* NVFLAGSCLR */
s->nvflags &= ~val;
break;
case 0x40: /* RESETCTL */
if (s->lockval == LOCK_VALUE) {
s->resetlevel = val;
if (val & 0x100)
qemu_system_reset_request ();
}
break;
case 0x44: /* PCICTL */
/* nothing to do. */
break;
case 0x4c: /* FLASH */
case 0x50: /* CLCD */
case 0x54: /* CLCDSER */
case 0x64: /* DMAPSR0 */
case 0x68: /* DMAPSR1 */
case 0x6c: /* DMAPSR2 */
case 0x70: /* IOSEL */
case 0x74: /* PLDCTL */
case 0x80: /* BUSID */
case 0x84: /* PROCID0 */
case 0x88: /* PROCID1 */
case 0x8c: /* OSCRESET0 */
case 0x90: /* OSCRESET1 */
case 0x94: /* OSCRESET2 */
case 0x98: /* OSCRESET3 */
case 0x9c: /* OSCRESET4 */
break;
default:
printf ("arm_sysctl_write: Bad register offset 0x%x\n", (int)offset);
return;
}
}
static CPUReadMemoryFunc *arm_sysctl_readfn[] = {
arm_sysctl_read,
arm_sysctl_read,
arm_sysctl_read
};
static CPUWriteMemoryFunc *arm_sysctl_writefn[] = {
arm_sysctl_write,
arm_sysctl_write,
arm_sysctl_write
};
static void arm_sysctl_init1(SysBusDevice *dev)
{
arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, dev);
int iomemtype;
s->sys_id = qdev_get_prop_int(&dev->qdev, "sys_id", 0);
/* The MPcore bootloader uses these flags to start secondary CPUs.
We don't use a bootloader, so do this here. */
s->flags = 3;
iomemtype = cpu_register_io_memory(arm_sysctl_readfn,
arm_sysctl_writefn, s);
sysbus_init_mmio(dev, 0x1000, iomemtype);
/* ??? Save/restore. */
}
/* Legacy helper function. */
void arm_sysctl_init(uint32_t base, uint32_t sys_id)
{
DeviceState *dev;
dev = qdev_create(NULL, "realview_sysctl");
qdev_set_prop_int(dev, "sys_id", sys_id);
qdev_init(dev);
sysbus_mmio_map(sysbus_from_qdev(dev), 0, base);
}
static void arm_sysctl_register_devices(void)
{
sysbus_register_dev("realview_sysctl", sizeof(arm_sysctl_state),
arm_sysctl_init1);
}
device_init(arm_sysctl_register_devices)
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