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Allocate and map a 12k data buffer such that it is contiguous in

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both the kernel and vm86 virtual address spaces. Use this to increase
the maximum VESA save state size we can handle.
This commit is contained in:
Ian Dowse 2005-03-04 00:53:03 +00:00
parent f18b179cc9
commit 0626b13a16
1 changed files with 21 additions and 9 deletions
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30
sys/i386/isa/vesa.c
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@ -76,6 +76,8 @@ typedef struct adp_state adp_state_t;
/* VESA video adapter */
static video_adapter_t *vesa_adp = NULL;
static int vesa_state_buf_size = 0;
#define VESA_VM86_BUFSIZE (3 * PAGE_SIZE)
static void *vesa_vm86_buf;
/* VESA functions */
#if 0
@ -187,7 +189,6 @@ static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
#define STATE_REG (1<<3)
#define STATE_MOST (STATE_HW | STATE_DATA | STATE_REG)
#define STATE_ALL (STATE_HW | STATE_DATA | STATE_DAC | STATE_REG)
#define STATE_MAXSIZE PAGE_SIZE
static int vesa_bios_state_buf_size(void);
static int vesa_bios_save_restore(int code, void *p, size_t size);
static int vesa_bios_get_line_length(void);
@ -245,7 +246,7 @@ vesa_bios_get_mode(int mode, struct vesa_mode *vmode)
bzero(&vmf, sizeof(vmf));
vmf.vmf_eax = 0x4f01;
vmf.vmf_ecx = mode;
buf = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
buf = vesa_vm86_buf;
vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
@ -311,7 +312,7 @@ vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
vmf.vmf_ebx = 1; /* get primary palette data */
vmf.vmf_ecx = colors;
vmf.vmf_edx = start;
p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
p = vesa_vm86_buf;
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
@ -341,7 +342,7 @@ vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
vmf.vmf_ebx = 1; /* get primary palette data */
vmf.vmf_ecx = colors;
vmf.vmf_edx = start;
p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
p = vesa_vm86_buf;
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
@ -365,7 +366,7 @@ vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
int err;
int i;
p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
p = vesa_vm86_buf;
bits = 8 - bits;
for (i = 0; i < colors; ++i) {
p[i*4] = palette[i*3 + 2] >> bits;
@ -395,7 +396,7 @@ vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
int err;
int i;
p = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
p = vesa_vm86_buf;
bits = 8 - bits;
for (i = 0; i < colors; ++i) {
p[i*4] = b[i] >> bits;
@ -439,14 +440,14 @@ vesa_bios_save_restore(int code, void *p, size_t size)
u_char *buf;
int err;
if (size > STATE_MAXSIZE)
if (size > VESA_VM86_BUFSIZE)
return (1);
bzero(&vmf, sizeof(vmf));
vmf.vmf_eax = 0x4f04;
vmf.vmf_ecx = STATE_ALL;
vmf.vmf_edx = code; /* STATE_SAVE/STATE_LOAD */
buf = (u_char *)vm86_getpage(&vesa_vmcontext, 1);
buf = vesa_vm86_buf;
vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_bx);
bcopy(p, buf, size);
@ -628,7 +629,15 @@ vesa_bios_init(void)
vesa_vmode_max = 0;
vesa_vmode[0].vi_mode = EOT;
vmbuf = (u_char *)vm86_addpage(&vesa_vmcontext, 1, 0);
/* Allocate a buffer and add each page to the vm86 context. */
vesa_vm86_buf = malloc(VESA_VM86_BUFSIZE, M_DEVBUF, M_WAITOK | M_ZERO);
KASSERT(((vm_offset_t)vesa_vm86_buf & PAGE_MASK) == 0,
("bad vesa_vm86_buf alignment"));
for (i = 0; i < howmany(VESA_VM86_BUFSIZE, PAGE_SIZE); i++)
vm86_addpage(&vesa_vmcontext, i + 1,
(vm_offset_t)vesa_vm86_buf + PAGE_SIZE * i);
vmbuf = vesa_vm86_buf;
bzero(&vmf, sizeof(vmf)); /* paranoia */
bcopy("VBE2", vmbuf, 4); /* try for VBE2 data */
vmf.vmf_eax = 0x4f00;
@ -1648,6 +1657,9 @@ vesa_unload(void)
}
splx(s);
if (vesa_vm86_buf != NULL)
free(vesa_vm86_buf, M_DEVBUF);
return error;
}