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hpet config mask fix 

I discovered a bug in the hpet code that caused Windows to boot without
hpet. The config mask I was using was preventing the guest from placing
the hpet into 32 bit mode.

(Beth Kon)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6357 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-01-16 21:38:58 +00:00
parent 0add30cff4
commit 35730fa055
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
hw/hpet.c
View File

@ -388,7 +388,8 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr,
switch ((addr - 0x100) % 0x20) {
case HPET_TN_CFG:
dprintf("qemu: hpet_ram_writel HPET_TN_CFG\n");
timer->config = hpet_fixup_reg(new_val, old_val, 0x3e4e);
timer->config = hpet_fixup_reg(new_val, old_val,
HPET_TN_CFG_WRITE_MASK);
if (new_val & HPET_TN_32BIT) {
timer->cmp = (uint32_t)timer->cmp;
timer->period = (uint32_t)timer->period;
@ -456,7 +457,8 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr,
case HPET_ID:
return;
case HPET_CFG:
s->config = hpet_fixup_reg(new_val, old_val, 0x3);
s->config = hpet_fixup_reg(new_val, old_val,
HPET_CFG_WRITE_MASK);
if (activating_bit(old_val, new_val, HPET_CFG_ENABLE)) {
/* Enable main counter and interrupt generation. */
s->hpet_offset = ticks_to_ns(s->hpet_counter)

2
hw/hpet_emul.h
View File

@ -36,6 +36,7 @@
#define HPET_TN_CFG 0x000
#define HPET_TN_CMP 0x008
#define HPET_TN_ROUTE 0x010
#define HPET_CFG_WRITE_MASK 0x3
#define HPET_TN_ENABLE 0x004
@ -45,6 +46,7 @@
#define HPET_TN_SETVAL 0x040
#define HPET_TN_32BIT 0x100
#define HPET_TN_INT_ROUTE_MASK 0x3e00
#define HPET_TN_CFG_WRITE_MASK 0x3f4e
#define HPET_TN_INT_ROUTE_SHIFT 9
#define HPET_TN_INT_ROUTE_CAP_SHIFT 32
#define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U