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hw/arm_sysctl.c: Add the Versatile Express system registers 

Add support for the Versatile Express SYS_CFG registers, which provide
a generic means of reading or writing configuration information from
various parts of the board. We only implement shutdown and reset.

Also make the RESETCTL register RAZ/WI on Versatile Express rather
than reset the board. Other system registers are generally the same
as Versatile and Realview.

This includes a VMState version number bump for arm_sysctl,
since we have new register state to preserve. It also adds
sys_mci to the VMState while we're bumping the version number
(an accidental omission from commit b50ff6f5).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-03-07 11:10:31 +00:00 committed by Aurelien Jarno
parent e0efb993b8
commit 34933c8c94
1 changed files with 63 additions and 1 deletions
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64
hw/arm_sysctl.c
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@ -27,11 +27,14 @@ typedef struct {
uint32_t resetlevel;
uint32_t proc_id;
uint32_t sys_mci;
uint32_t sys_cfgdata;
uint32_t sys_cfgctrl;
uint32_t sys_cfgstat;
} arm_sysctl_state;
static const VMStateDescription vmstate_arm_sysctl = {
.name = "realview_sysctl",
.version_id = 1,
.version_id = 2,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(leds, arm_sysctl_state),
@ -41,6 +44,10 @@ static const VMStateDescription vmstate_arm_sysctl = {
VMSTATE_UINT32(flags, arm_sysctl_state),
VMSTATE_UINT32(nvflags, arm_sysctl_state),
VMSTATE_UINT32(resetlevel, arm_sysctl_state),
VMSTATE_UINT32_V(sys_mci, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgdata, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgctrl, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgstat, arm_sysctl_state, 2),
VMSTATE_END_OF_LIST()
}
};
@ -53,6 +60,7 @@ static const VMStateDescription vmstate_arm_sysctl = {
#define BOARD_ID_EB 0x140
#define BOARD_ID_PBA8 0x178
#define BOARD_ID_PBX 0x182
#define BOARD_ID_VEXPRESS 0x190
static int board_id(arm_sysctl_state *s)
{
@ -104,6 +112,10 @@ static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset)
case 0x38: /* NVFLAGS */
return s->nvflags;
case 0x40: /* RESETCTL */
if (board_id(s) == BOARD_ID_VEXPRESS) {
/* reserved: RAZ/WI */
return 0;
}
return s->resetlevel;
case 0x44: /* PCICTL */
return 1;
@ -142,7 +154,23 @@ static uint32_t arm_sysctl_read(void *opaque, target_phys_addr_t offset)
case 0xcc: /* SYS_TEST_OSC3 */
case 0xd0: /* SYS_TEST_OSC4 */
return 0;
case 0xa0: /* SYS_CFGDATA */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgdata;
case 0xa4: /* SYS_CFGCTRL */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgctrl;
case 0xa8: /* SYS_CFGSTAT */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgstat;
default:
bad_reg:
printf ("arm_sysctl_read: Bad register offset 0x%x\n", (int)offset);
return 0;
}
@ -190,6 +218,10 @@ static void arm_sysctl_write(void *opaque, target_phys_addr_t offset,
s->nvflags &= ~val;
break;
case 0x40: /* RESETCTL */
if (board_id(s) == BOARD_ID_VEXPRESS) {
/* reserved: RAZ/WI */
break;
}
if (s->lockval == LOCK_VALUE) {
s->resetlevel = val;
if (val & 0x100)
@ -216,7 +248,37 @@ static void arm_sysctl_write(void *opaque, target_phys_addr_t offset,
case 0x98: /* OSCRESET3 */
case 0x9c: /* OSCRESET4 */
break;
case 0xa0: /* SYS_CFGDATA */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
s->sys_cfgdata = val;
return;
case 0xa4: /* SYS_CFGCTRL */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
s->sys_cfgctrl = val & ~(3 << 18);
s->sys_cfgstat = 1; /* complete */
switch (s->sys_cfgctrl) {
case 0xc0800000: /* SYS_CFG_SHUTDOWN to motherboard */
qemu_system_shutdown_request();
break;
case 0xc0900000: /* SYS_CFG_REBOOT to motherboard */
qemu_system_reset_request();
break;
default:
s->sys_cfgstat |= 2; /* error */
}
return;
case 0xa8: /* SYS_CFGSTAT */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
s->sys_cfgstat = val & 3;
return;
default:
bad_reg:
printf ("arm_sysctl_write: Bad register offset 0x%x\n", (int)offset);
return;
}