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Initialize registers to zero before calling the interrupt handlers inside

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emulator.  This fixes VESA related freeze observed on some systems.

Submitted by:	paradox <ddkprog yahoo com>
This commit is contained in:
Xin LI 2009-09-23 02:45:02 +00:00
parent 01a967e266
commit f27b147e40
1 changed files with 19 additions and 0 deletions
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19
sys/dev/fb/vesa.c
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@ -221,6 +221,7 @@ int10_set_mode(int mode)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x0000 | mode;
x86biosCall(&regs, 0x10);
@ -236,6 +237,7 @@ vesa_bios_get_mode(int mode, struct vesa_mode *vmode)
int offs;
u_char *buf;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f01;
regs.R_ECX = mode;
@ -263,6 +265,7 @@ vesa_bios_set_mode(int mode)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f02;
regs.R_EBX = mode;
@ -276,6 +279,7 @@ vesa_bios_get_dac(void)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f08;
regs.R_EBX = 1;
@ -292,6 +296,7 @@ vesa_bios_set_dac(int bits)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f08;
regs.R_EBX = (bits << 8);
@ -311,6 +316,7 @@ vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
u_char *p;
int i;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f09;
regs.R_EBX = 1;
regs.R_ECX = colors;
@ -349,6 +355,7 @@ vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
u_char *p;
int i;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f09;
regs.R_EBX = 1;
regs.R_ECX = colors;
@ -396,6 +403,7 @@ vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
p[i*4 + 3] = 0;
}
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f09;
regs.R_EBX = 0;
regs.R_ECX = colors;
@ -431,6 +439,7 @@ vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
p[i*4 + 3] = 0;
}
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f09;
regs.R_EBX = 0;
regs.R_ECX = colors;
@ -452,6 +461,7 @@ vesa_bios_state_buf_size(void)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f04;
regs.R_ECX = STATE_ALL;
regs.R_EDX = STATE_SIZE;
@ -474,6 +484,7 @@ vesa_bios_save_restore(int code, void *p, size_t size)
if (size > VESA_BIOS_BUFSIZE)
return (1);
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f04;
regs.R_ECX = STATE_ALL;
regs.R_EDX = code;
@ -499,6 +510,7 @@ vesa_bios_get_line_length(void)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f06;
regs.R_EBX = 1;
@ -515,6 +527,7 @@ vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f06;
regs.R_EBX = 0;
regs.R_ECX = pixel;
@ -541,6 +554,7 @@ vesa_bios_get_start(int *x, int *y)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f07;
regs.R_EBX = 1;
@ -561,6 +575,7 @@ vesa_bios_set_start(int x, int y)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f07;
regs.R_EBX = 0x80;
regs.R_EDX = y;
@ -662,6 +677,7 @@ vesa_bios_init(void)
vmbuf = (u_char *)x86biosAlloc(1, &offs);
bcopy("VBE2", vmbuf, 4); /* try for VBE2 data */
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f00;
regs.R_ES = SEG_ADDR(offs);
regs.R_DI = SEG_OFF(offs);
@ -1262,6 +1278,7 @@ vesa_get_origin(video_adapter_t *adp, off_t *offset)
{
x86regs_t regs;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f05;
regs.R_EBX = 0x10;
@ -1296,6 +1313,7 @@ vesa_set_origin(video_adapter_t *adp, off_t offset)
if (adp->va_window_gran == 0)
return 1;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f05;
regs.R_EBX = 0;
regs.R_EDX = offset / adp->va_window_gran;
@ -1304,6 +1322,7 @@ vesa_set_origin(video_adapter_t *adp, off_t offset)
if ((regs.R_AX & 0xff) != 0x4f)
return 1;
bzero(&regs, sizeof(regs));
regs.R_EAX = 0x4f05;
regs.R_EBX = 1;
regs.R_EDX = offset / adp->va_window_gran;