[src/trunk]: src/sys/arch/i386/bios First cut on VESA BIOS access to get exte...

[drochner <drochner%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/540912d26c07
branches:  trunk
changeset: 533686:540912d26c07
user:      drochner <drochner%NetBSD.org@localhost>
date:      Sun Jul 07 12:59:58 2002 +0000

description:
First cut on VESA BIOS access to get extended video modes and framebuffer
access. For now, there is just probing code.

diffstat:

 sys/arch/i386/bios/vesabios.c |  85 +++++++++++++++++++++++++++++++++++++++++++
 sys/arch/i386/bios/vesabios.h |   7 +++
 2 files changed, 92 insertions(+), 0 deletions(-)

diffs (100 lines):

diff -r 0488120880a8 -r 540912d26c07 sys/arch/i386/bios/vesabios.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/bios/vesabios.c     Sun Jul 07 12:59:58 2002 +0000
@@ -0,0 +1,85 @@
+/* $NetBSD: vesabios.c,v 1.1 2002/07/07 12:59:58 drochner Exp $ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <machine/frame.h>
+#include <machine/kvm86.h>
+
+#include <arch/i386/bios/vesabios.h>
+
+struct vbeinfoblock
+{
+       char VbeSignature[4];
+       u_int16_t VbeVersion;
+       u_int32_t OemStringPtr;
+       u_int32_t Capabilities;
+       u_int32_t VideoModePtr;
+       u_int16_t TotalMemory;
+       u_int16_t OemSoftwareRev;
+       u_int32_t OemVendorNamePtr, OemProductNamePtr, OemProductRevPtr;
+       /* data area, in total max 512 bytes for VBE 2.0 */
+} __attribute__ ((packed));
+
+static int vesabios_match(struct device *, struct cfdata *, void *);
+
+struct cfattach vesabios_ca = {
+       sizeof(struct device), vesabios_match, 0
+};
+
+static int
+vesabios_match(parent, match, aux)
+       struct device *parent;
+       struct cfdata *match;
+       void *aux;
+{
+       struct vesabios_attach_args *vaa = aux;
+
+       /* These are not the droids you're looking for. */
+       if (strcmp(vaa->vaa_busname, "vesabios") != 0)
+               return (0);
+
+       return (0); /* XXX for now */
+}
+
+int
+vbeprobe()
+{
+       unsigned char *buf;
+       struct trapframe tf;
+       int res, ok = 0;
+       struct vbeinfoblock *vi;
+
+       buf = kvm86_bios_addpage(0x2000);
+       if (!buf) {
+               printf("vbeprobe: kvm86_bios_addpage(0x2000) failed\n");
+               return (0);
+       }
+
+       memcpy(buf, "VBE2", 4);
+
+       memset(&tf, 0, sizeof(struct trapframe));
+       tf.tf_eax = 0x4f00; /* function code */
+       tf.tf_es = 0;
+       tf.tf_edi = 0x2000; /* buf ptr */
+
+       res = kvm86_bioscall(0x10, &tf);
+
+       printf("vbecall: res=%d, ax=%x\n", res, tf.tf_eax);
+       if (res || tf.tf_eax != 0x004f)
+               goto out;
+
+       vi = (struct vbeinfoblock *)buf;
+       if (memcmp(vi->VbeSignature, "VESA", 4)) {
+               printf("VESA: bad sig\n");
+               goto out;
+       }
+       printf("VESA: version: %x, cap: %x, oem @%x, modes @%x\n",
+              vi->VbeVersion, vi->Capabilities, vi->OemStringPtr,
+              vi->VideoModePtr);
+       ok = 1;
+
+out:
+       kvm86_bios_delpage(0x2000, buf);
+       return (ok);
+}
diff -r 0488120880a8 -r 540912d26c07 sys/arch/i386/bios/vesabios.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/bios/vesabios.h     Sun Jul 07 12:59:58 2002 +0000
@@ -0,0 +1,7 @@
+/* $NetBSD: vesabios.h,v 1.1 2002/07/07 12:59:58 drochner Exp $ */
+
+int vbeprobe __P((void));
+
+struct vesabios_attach_args {
+       char *vaa_busname;
+};