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- Ouch! Do not assume the VESA BIOS will preserve the upper 16 bits

Browse source 
of EAX and EBX.
This commit is contained in:
Kazutaka YOKOTA 1999-08-27 09:18:42 +00:00
parent 85ab7ba1e0
commit 23ed6fc8bc
1 changed files with 20 additions and 20 deletions
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40
sys/i386/isa/vesa.c
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@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: vesa.c,v 1.25 1999/06/22 14:13:13 yokota Exp $
* $Id: vesa.c,v 1.26 1999/07/01 15:05:11 peter Exp $
*/
#include "vga.h"
@ -250,7 +250,7 @@ vesa_bios_get_mode(int mode, struct vesa_mode *vmode)
vm86_getptr(&vesa_vmcontext, (vm_offset_t)buf, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
bcopy(buf, vmode, sizeof(*vmode));
return 0;
@ -266,7 +266,7 @@ vesa_bios_set_mode(int mode)
vmf.vmf_eax = 0x4f02;
vmf.vmf_ebx = mode;
err = vm86_intcall(0x10, &vmf);
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
static int
@ -279,7 +279,7 @@ vesa_bios_get_dac(void)
vmf.vmf_eax = 0x4f08;
vmf.vmf_ebx = 1; /* get DAC width */
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 6; /* XXX */
return ((vmf.vmf_ebx >> 8) & 0x00ff);
}
@ -294,7 +294,7 @@ vesa_bios_set_dac(int bits)
vmf.vmf_eax = 0x4f08;
vmf.vmf_ebx = (bits << 8);
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 6; /* XXX */
return ((vmf.vmf_ebx >> 8) & 0x00ff);
}
@ -316,7 +316,7 @@ vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
bits = 8 - bits;
@ -346,7 +346,7 @@ vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
bits = 8 - bits;
@ -383,7 +383,7 @@ vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
#ifdef notyet
@ -413,7 +413,7 @@ vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
vm86_getptr(&vesa_vmcontext, (vm_offset_t)p, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
#endif
@ -428,9 +428,9 @@ vesa_bios_state_buf_size(void)
vmf.vmf_ecx = STATE_MOST;
vmf.vmf_edx = STATE_SIZE;
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 0;
return vmf.vmf_ebx*64;
return vmf.vmf_bx*64;
}
static int
@ -449,7 +449,7 @@ vesa_bios_save_restore(int code, void *p, size_t size)
bcopy(p, buf, size);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
static int
@ -462,7 +462,7 @@ vesa_bios_get_line_length(void)
vmf.vmf_eax = 0x4f06;
vmf.vmf_ebx = 1; /* get scan line length */
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return -1;
return vmf.vmf_bx; /* line length in bytes */
}
@ -481,7 +481,7 @@ vesa_bios_set_line_length(int pixel)
#if VESA_DEBUG > 1
printf("bx:%d, cx:%d, dx:%d\n", vmf.vmf_bx, vmf.vmf_cx, vmf.vmf_dx);
#endif
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
#if 0
@ -495,7 +495,7 @@ vesa_bios_get_start(int *x, int *y)
vmf.vmf_eax = 0x4f07;
vmf.vmf_ebx = 1; /* get display start */
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
*x = vmf.vmf_cx;
*y = vmf.vmf_dx;
@ -515,7 +515,7 @@ vesa_bios_set_start(int x, int y)
vmf.vmf_edx = y;
vmf.vmf_ecx = x;
err = vm86_intcall(0x10, &vmf);
return ((err != 0) || (vmf.vmf_eax != 0x4f));
return ((err != 0) || (vmf.vmf_ax != 0x4f));
}
/* map a generic video mode to a known mode */
@ -625,7 +625,7 @@ vesa_bios_init(void)
vm86_getptr(&vesa_vmcontext, (vm_offset_t)vmbuf, &vmf.vmf_es, &vmf.vmf_di);
err = vm86_datacall(0x10, &vmf, &vesa_vmcontext);
if ((err != 0) || (vmf.vmf_eax != 0x4f) || bcmp("VESA", vmbuf, 4))
if ((err != 0) || (vmf.vmf_ax != 0x4f) || bcmp("VESA", vmbuf, 4))
return 1;
bcopy(vmbuf, buf, sizeof(buf));
vesa_adp_info = (struct vesa_info *)buf;
@ -690,7 +690,7 @@ vesa_bios_init(void)
M_DEVBUF, M_WAITOK);
#if VESA_DEBUG > 1
printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
modes, vesa_mode_max);
modes, vesa_vmode_max);
#endif
if (modes > 0) {
bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
@ -1192,7 +1192,7 @@ vesa_get_origin(video_adapter_t *adp, off_t *offset)
vmf.vmf_eax = 0x4f05;
vmf.vmf_ebx = 0x10; /* WINDOW_A, XXX */
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
*offset = vmf.vmf_dx*adp->va_window_gran;
return 0;
@ -1226,7 +1226,7 @@ vesa_set_origin(video_adapter_t *adp, off_t offset)
vmf.vmf_ebx = 0; /* WINDOW_A, XXX */
vmf.vmf_edx = offset/adp->va_window_gran;
err = vm86_intcall(0x10, &vmf);
if ((err != 0) || (vmf.vmf_eax != 0x4f))
if ((err != 0) || (vmf.vmf_ax != 0x4f))
return 1;
bzero(&vmf, sizeof(vmf));
vmf.vmf_eax = 0x4f05;