bochsvga_set_mode(u16 mode, struct vbe_modeinfo *info)
{
if (info->depth == 4)
- vga_set_mode(0x6a, 0);
+ stdvga_set_mode(0x6a, 0);
if (info->depth == 8)
// XXX load_dac_palette(3);
;
#include "farptr.h" // SET_FARVAR
#include "biosvar.h" // GET_GLOBAL
#include "util.h" // memcpy_far
+#include "vgabios.h" // find_vga_entry
// TODO
// * replace direct in/out calls with wrapper functions
* Attribute control
****************************************************************/
-void
+static void
stdvga_screen_disable(void)
{
inb(VGAREG_ACTL_RESET);
outb(0x00, VGAREG_ACTL_ADDRESS);
}
-void
+static void
stdvga_screen_enable(void)
{
inb(VGAREG_ACTL_RESET);
outb(GET_FARVAR(seg, info->peladdr), VGAREG_DAC_WRITE_ADDRESS);
}
+void
+stdvga_perform_gray_scale_summing(u16 start, u16 count)
+{
+ stdvga_screen_disable();
+ int i;
+ for (i = start; i < start+count; i++) {
+ u8 rgb[3];
+ stdvga_get_dac_regs(GET_SEG(SS), rgb, i, 1);
+
+ // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
+ u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
+ if (intensity > 0x3f)
+ intensity = 0x3f;
+
+ stdvga_set_dac_regs(GET_SEG(SS), rgb, i, 1);
+ }
+ stdvga_screen_enable();
+}
+
/****************************************************************
* Memory control
outb(GET_FARVAR(seg, info->feature), crtc_addr - 0x4 + 0xa);
}
+static void
+clear_screen(struct vgamode_s *vmode_g)
+{
+ switch (GET_GLOBAL(vmode_g->memmodel)) {
+ case CTEXT:
+ case MTEXT:
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0720, 32*1024);
+ break;
+ case CGA:
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 32*1024);
+ break;
+ default:
+ // XXX - old code gets/sets/restores sequ register 2 to 0xf -
+ // but it should always be 0xf anyway.
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 64*1024);
+ }
+}
+
void
-stdvga_set_mode(struct vgamode_s *vmode_g)
+stdvga_set_mode(int mode, int flags)
{
+ // find the entry in the video modes
+ struct vgamode_s *vmode_g = find_vga_entry(mode);
+ dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
+ if (!vmode_g)
+ return;
+
+ // if palette loading (bit 3 of modeset ctl = 0)
+ if (!(flags & MF_NOPALETTE)) { // Set the PEL mask
+ stdvga_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
+
+ // From which palette
+ u8 *palette_g = GET_GLOBAL(vmode_g->dac);
+ u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
+
+ // Always 256*3 values
+ stdvga_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
+ u16 i;
+ for (i = palsize; i < 0x0100; i++) {
+ static u8 rgb[3] VAR16;
+ stdvga_set_dac_regs(get_global_seg(), rgb, i, 1);
+ }
+
+ if (flags & MF_GRAYSUM)
+ stdvga_perform_gray_scale_summing(0x00, 0x100);
+ }
+
// Reset Attribute Ctl flip-flop
inb(VGAREG_ACTL_RESET);
// Enable video
outb(0x20, VGAREG_ACTL_ADDRESS);
inb(VGAREG_ACTL_RESET);
+
+ // Clear screen
+ if (!(flags & MF_NOCLEARMEM))
+ clear_screen(vmode_g);
+
+ // Write the fonts in memory
+ u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
+ if (memmodel & TEXT)
+ stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, 0, 16);
+
+ // Setup BDA variables
+ modeswitch_set_bda(mode, flags, vmode_g);
}
u8 color_select;
};
-void stdvga_screen_disable(void);
-void stdvga_screen_enable(void);
void stdvga_set_border_color(u8 color);
void stdvga_set_overscan_border_color(u8 color);
u8 stdvga_get_overscan_border_color(void);
u8 stdvga_get_pel_mask(void);
void stdvga_save_dac_state(u16 seg, struct saveDACcolors *info);
void stdvga_restore_dac_state(u16 seg, struct saveDACcolors *info);
+void stdvga_perform_gray_scale_summing(u16 start, u16 count);
void stdvga_sequ_write(u8 index, u8 value);
void stdvga_grdc_write(u8 index, u8 value);
void stdvga_set_text_block_specifier(u8 spec);
u16 stdvga_get_vde(void);
void stdvga_save_state(u16 seg, struct saveVideoHardware *info);
void stdvga_restore_state(u16 seg, struct saveVideoHardware *info);
-void stdvga_set_mode(struct vgamode_s *vmode_g);
+void stdvga_set_mode(int mode, int flags);
void stdvga_enable_video_addressing(u8 disable);
void stdvga_init(void);
#include "util.h" // dprintf
#include "biosvar.h" // get_global_set
#include "bochsvga.h" // bochsvga_set_mode
+#include "stdvga.h" // stdvga_set_mode
static void
vbe_104f00(struct bregs *regs)
dprintf(1, "set VGA mode %x\n", mode);
bochsvga_hires_enable(0);
- vga_set_mode(mode, 0);
+ stdvga_set_mode(mode, 0);
} else { /* VBE */
rc = bochsvga_mode_info(mode & 0x1ff, &modeinfo);
if (rc) {
#include "vgabios.h" // find_vga_entry
#include "optionroms.h" // struct pci_data
#include "config.h" // CONFIG_*
-#include "stdvga.h" // stdvga_screen_disable
+#include "stdvga.h" // stdvga_set_mode
#include "geodelx.h" // geodelx_init
#include "bochsvga.h" // bochsvga_init
* Helper functions
****************************************************************/
-static void
-perform_gray_scale_summing(u16 start, u16 count)
-{
- stdvga_screen_disable();
- int i;
- for (i = start; i < start+count; i++) {
- u8 rgb[3];
- stdvga_get_dac_regs(GET_SEG(SS), rgb, i, 1);
-
- // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
- u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
- if (intensity > 0x3f)
- intensity = 0x3f;
-
- stdvga_set_dac_regs(GET_SEG(SS), rgb, i, 1);
- }
- stdvga_screen_enable();
-}
-
static void
set_cursor_shape(u8 start, u8 end)
{
SET_IVT(0x43, GET_FARVAR(seg, info->font1));
}
-
-/****************************************************************
- * VGA int 10 handler
- ****************************************************************/
-
-// set video mode
+// Setup BDA after a mode switch.
void
-vga_set_mode(u8 mode, u8 noclearmem)
+modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g)
{
- // find the entry in the video modes
- struct vgamode_s *vmode_g = find_vga_entry(mode);
- dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
- if (!vmode_g)
- return;
-
- // Read the bios mode set control
- u8 modeset_ctl = GET_BDA(modeset_ctl);
-
- // Then we know the number of lines
-// FIXME
-
- // if palette loading (bit 3 of modeset ctl = 0)
- if ((modeset_ctl & 0x08) == 0) { // Set the PEL mask
- stdvga_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
-
- // From which palette
- u8 *palette_g = GET_GLOBAL(vmode_g->dac);
- u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
-
- // Always 256*3 values
- stdvga_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
- u16 i;
- for (i = palsize; i < 0x0100; i++) {
- static u8 rgb[3] VAR16;
- stdvga_set_dac_regs(get_global_seg(), rgb, i, 1);
- }
-
- if ((modeset_ctl & 0x02) == 0x02)
- perform_gray_scale_summing(0x00, 0x100);
- }
-
- stdvga_set_mode(vmode_g);
-
- if (noclearmem == 0x00)
- clear_screen(vmode_g);
-
- // Write the fonts in memory
- u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
- if (memmodel & TEXT)
- stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, 0, 16);
-
// Set the BIOS mem
u16 cheight = GET_GLOBAL(vmode_g->cheight);
SET_BDA(video_mode, mode);
SET_BDA(crtc_address, stdvga_get_crtc());
SET_BDA(video_rows, GET_GLOBAL(vmode_g->theight)-1);
SET_BDA(char_height, cheight);
- SET_BDA(video_ctl, (0x60 | noclearmem));
+ SET_BDA(video_ctl, 0x60 | (flags & MF_NOCLEARMEM ? 0x80 : 0x00));
SET_BDA(video_switches, 0xF9);
SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f);
- SET_BDA(cursor_type, memmodel & TEXT ? 0x0607 : 0x0000);
+ SET_BDA(cursor_type, GET_GLOBAL(vmode_g->memmodel) & TEXT ? 0x0607 : 0x0000);
int i;
for (i=0; i<8; i++)
SET_BDA(cursor_pos[i], 0x0000);
}
}
+
+/****************************************************************
+ * VGA int 10 handler
+ ****************************************************************/
+
static void
handle_1000(struct bregs *regs)
{
if (bochsvga_enabled())
bochsvga_hires_enable(0);
- vga_set_mode(mode, noclearmem);
+ int flags = GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM);
+ if (noclearmem)
+ flags |= MF_NOCLEARMEM;
+
+ stdvga_set_mode(mode, flags);
}
static void
static void
handle_10101b(struct bregs *regs)
{
- perform_gray_scale_summing(regs->bx, regs->cx);
+ stdvga_perform_gray_scale_summing(regs->bx, regs->cx);
}
static void
struct segoff_s font1;
};
+// Mode flags
+#define MF_GRAYSUM 0x0002
+#define MF_NOPALETTE 0x0008
+#define MF_CUSTOMCRTC 0x0800
+#define MF_LINEARFB 0x4000
+#define MF_NOCLEARMEM 0x8000
+
// vgatables.c
struct vgamode_s;
struct vgamode_s *find_vga_entry(u8 mode);
struct cursorpos {
u8 x, y, page;
};
-void vga_set_mode(u8 mode, u8 noclearmem);
+void modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g);
// vgafb.c
-void clear_screen(struct vgamode_s *vmode_g);
void vgafb_scroll(int nblines, int attr
, struct cursorpos ul, struct cursorpos lr);
void vgafb_write_char(struct cursorpos cp, struct carattr ca);
}
}
-void
-clear_screen(struct vgamode_s *vmode_g)
-{
- switch (GET_GLOBAL(vmode_g->memmodel)) {
- case CTEXT:
- case MTEXT:
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0720, 32*1024);
- break;
- case CGA:
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 32*1024);
- break;
- default:
- // XXX - old code gets/sets/restores sequ register 2 to 0xf -
- // but it should always be 0xf anyway.
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 64*1024);
- }
-}
-
/****************************************************************
* Read/write characters to screen