#include "stdvga.h" // stdvga_set_cursor_shape
#include "clext.h" // clext_1012
#include "vgahw.h" // vgahw_set_mode
+#include "vbe.h" // VBE_RETURN_STATUS_FAILED
#include "pci.h" // pci_config_readw
#include "pci_regs.h" // PCI_VENDOR_ID
* Helper functions
****************************************************************/
+// Return the bits per pixel in system memory for a given mode.
+int
+vga_bpp(struct vgamode_s *vmode_g)
+{
+ switch (GET_GLOBAL(vmode_g->memmodel)) {
+ case MM_TEXT:
+ return 16;
+ case MM_PLANAR:
+ return 1;
+ }
+ u8 depth = GET_GLOBAL(vmode_g->depth);
+ if (depth > 8)
+ return ALIGN(depth, 8);
+ return depth;
+}
+
u16
calc_page_size(u8 memmodel, u16 width, u16 height)
{
return;
// Calculate the memory address
- u16 nbcols = GET_BDA(video_cols);
- u16 address = (GET_BDA(video_pagesize) * cp.page
- + (cp.x + cp.y * nbcols) * 2);
-
- stdvga_set_cursor_pos(address / 2);
+ int address = (GET_BDA(video_pagesize) * cp.page
+ + (cp.x + cp.y * GET_BDA(video_cols)) * 2);
+ stdvga_set_cursor_pos(address);
}
static struct cursorpos
struct cursorpos cp = get_cursor_pos(page);
// Calculate memory address of start of page
- u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
- u16 address = GET_BDA(video_pagesize) * page;
- stdvga_set_active_page(memmodel == MM_TEXT ? address / 2 : address);
+ int address = GET_BDA(video_pagesize) * page;
+ vgahw_set_displaystart(vmode_g, address);
// And change the BIOS page
SET_BDA(video_pagestart, address);
static void
restore_bda_state(u16 seg, struct saveBDAstate *info)
{
- SET_BDA(video_mode, GET_FARVAR(seg, info->video_mode));
+ u16 mode = GET_FARVAR(seg, info->video_mode);
+ SET_BDA(video_mode, mode);
+ SET_BDA(vbe_mode, mode);
SET_BDA(video_cols, GET_FARVAR(seg, info->video_cols));
SET_BDA(video_pagesize, GET_FARVAR(seg, info->video_pagesize));
SET_BDA(crtc_address, GET_FARVAR(seg, info->crtc_address));
struct vgamode_s *
get_current_mode(void)
{
- return vgahw_find_mode(GET_BDA(video_mode));
+ return vgahw_find_mode(GET_BDA(vbe_mode) & ~MF_VBEFLAGS);
}
// Setup BDA after a mode switch.
-void
-modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g)
+int
+vga_set_mode(int mode, int flags)
{
+ dprintf(1, "set VGA mode %x\n", mode);
+ struct vgamode_s *vmode_g = vgahw_find_mode(mode);
+ if (!vmode_g)
+ return VBE_RETURN_STATUS_FAILED;
+
+ int ret = vgahw_set_mode(vmode_g, flags);
+ if (ret)
+ return ret;
+
// Set the BIOS mem
int width = GET_GLOBAL(vmode_g->width);
int height = GET_GLOBAL(vmode_g->height);
u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
int cheight = GET_GLOBAL(vmode_g->cheight);
- SET_BDA(video_mode, mode);
+ if (mode < 0x100)
+ SET_BDA(video_mode, mode);
+ else
+ SET_BDA(video_mode, 0xff);
+ SET_BDA(vbe_mode, mode | (flags & MF_VBEFLAGS));
if (memmodel == MM_TEXT) {
SET_BDA(video_cols, width);
SET_BDA(video_rows, height-1);
SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont16));
break;
}
+
+ return 0;
}
if (regs->al & 0x80)
flags |= MF_NOCLEARMEM;
- vgahw_set_mode(mode, flags);
+ vga_set_mode(mode, flags);
}
static void
if (CONFIG_VGA_PCI) {
u16 bdf = regs->ax;
- if (pci_config_readw(bdf, PCI_VENDOR_ID) == CONFIG_VGA_VID
- && pci_config_readw(bdf, PCI_DEVICE_ID) == CONFIG_VGA_DID)
+ if ((pci_config_readw(bdf, PCI_VENDOR_ID)
+ == GET_GLOBAL(rom_pci_data.vendor))
+ && (pci_config_readw(bdf, PCI_DEVICE_ID)
+ == GET_GLOBAL(rom_pci_data.device)))
SET_VGA(VgaBDF, bdf);
}