vgabios: Rename vbe.c to bochsvga.c.

The code is specific to the Bochs "dispi" interface, not the vesa
video bios extensions spec.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 55 insertions, 0 deletions

diff --git a/vgasrc/bochsvga.h b/vgasrc/bochsvga.h
new file mode 100644
index 00000000..963cb133
--- /dev/null
+++ b/vgasrc/bochsvga.h
@@ -0,0 +1,55 @@
+#ifndef __DISPI_H
+#define __DISPI_H
+
+#include "types.h" // u8
+#include "ioport.h" // outb
+
+#define VBE_DISPI_BANK_ADDRESS           0xA0000
+#define VBE_DISPI_BANK_SIZE_KB           64
+
+#define VBE_DISPI_MAX_XRES               2560
+#define VBE_DISPI_MAX_YRES               1600
+
+#define VBE_DISPI_IOPORT_INDEX           0x01CE
+#define VBE_DISPI_IOPORT_DATA            0x01CF
+
+#define VBE_DISPI_INDEX_ID               0x0
+#define VBE_DISPI_INDEX_XRES             0x1
+#define VBE_DISPI_INDEX_YRES             0x2
+#define VBE_DISPI_INDEX_BPP              0x3
+#define VBE_DISPI_INDEX_ENABLE           0x4
+#define VBE_DISPI_INDEX_BANK             0x5
+#define VBE_DISPI_INDEX_VIRT_WIDTH       0x6
+#define VBE_DISPI_INDEX_VIRT_HEIGHT      0x7
+#define VBE_DISPI_INDEX_X_OFFSET         0x8
+#define VBE_DISPI_INDEX_Y_OFFSET         0x9
+#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
+
+#define VBE_DISPI_ID0                    0xB0C0
+#define VBE_DISPI_ID1                    0xB0C1
+#define VBE_DISPI_ID2                    0xB0C2
+#define VBE_DISPI_ID3                    0xB0C3
+#define VBE_DISPI_ID4                    0xB0C4
+#define VBE_DISPI_ID5                    0xB0C5
+
+#define VBE_DISPI_DISABLED               0x00
+#define VBE_DISPI_ENABLED                0x01
+#define VBE_DISPI_GETCAPS                0x02
+#define VBE_DISPI_8BIT_DAC               0x20
+#define VBE_DISPI_LFB_ENABLED            0x40
+#define VBE_DISPI_NOCLEARMEM             0x80
+
+#define VBE_DISPI_LFB_PHYSICAL_ADDRESS   0xE0000000
+
+static inline u16 dispi_read(u16 reg)
+{
+    outw(reg, VBE_DISPI_IOPORT_INDEX);
+    return inw(VBE_DISPI_IOPORT_DATA);
+}
+static inline void dispi_write(u16 reg, u16 val)
+{
+    outw(reg, VBE_DISPI_IOPORT_INDEX);
+    outw(val, VBE_DISPI_IOPORT_DATA);
+}
+
+#endif