--- /dev/null
+// VGA bios implementation
+//
+// Copyright (C) 2009-2013 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2001-2008 the LGPL VGABios developers Team
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "biosvar.h" // GET_BDA
+#include "bregs.h" // struct bregs
+#include "clext.h" // clext_1012
+#include "config.h" // CONFIG_*
+#include "output.h" // dprintf
+#include "std/vbe.h" // VBE_RETURN_STATUS_FAILED
+#include "stdvga.h" // stdvga_set_cursor_shape
+#include "string.h" // memset_far
+#include "vgabios.h" // calc_page_size
+#include "vgahw.h" // vgahw_set_mode
+
+
+/****************************************************************
+ * 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)
+{
+ switch (memmodel) {
+ case MM_TEXT:
+ return ALIGN(width * height * 2, 2*1024);
+ case MM_CGA:
+ return 16*1024;
+ default:
+ return ALIGN(width * height / 8, 8*1024);
+ }
+}
+
+// Determine cursor shape (taking into account possible cursor scaling)
+u16
+get_cursor_shape(void)
+{
+ u16 cursor_type = GET_BDA(cursor_type);
+ u8 emulate_cursor = (GET_BDA(video_ctl) & 1) == 0;
+ if (!emulate_cursor)
+ return cursor_type;
+ u8 start = (cursor_type >> 8) & 0x3f;
+ u8 end = cursor_type & 0x1f;
+ u16 cheight = GET_BDA(char_height);
+ if (cheight <= 8 || end >= 8 || start >= 0x20)
+ return cursor_type;
+ if (end != (start + 1))
+ start = ((start + 1) * cheight / 8) - 1;
+ else
+ start = ((end + 1) * cheight / 8) - 2;
+ end = ((end + 1) * cheight / 8) - 1;
+ return (start << 8) | end;
+}
+
+static void
+set_cursor_shape(u16 cursor_type)
+{
+ vgafb_set_swcursor(0);
+ SET_BDA(cursor_type, cursor_type);
+ if (CONFIG_VGA_STDVGA_PORTS)
+ stdvga_set_cursor_shape(get_cursor_shape());
+}
+
+static void
+set_cursor_pos(struct cursorpos cp)
+{
+ u8 page = cp.page, x = cp.x, y = cp.y;
+
+ // Should not happen...
+ if (page > 7)
+ return;
+
+ vgafb_set_swcursor(0);
+
+ // Bios cursor pos
+ SET_BDA(cursor_pos[page], (y << 8) | x);
+
+ if (!CONFIG_VGA_STDVGA_PORTS)
+ return;
+
+ // Set the hardware cursor
+ u8 current = GET_BDA(video_page);
+ if (cp.page != current)
+ return;
+
+ // Calculate the memory address
+ stdvga_set_cursor_pos((int)text_address(cp));
+}
+
+struct cursorpos
+get_cursor_pos(u8 page)
+{
+ if (page == 0xff)
+ // special case - use current page
+ page = GET_BDA(video_page);
+ if (page > 7) {
+ struct cursorpos cp = { 0, 0, 0xfe };
+ return cp;
+ }
+ u16 xy = GET_BDA(cursor_pos[page]);
+ struct cursorpos cp = {xy, xy>>8, page};
+ return cp;
+}
+
+static void
+set_active_page(u8 page)
+{
+ if (page > 7)
+ return;
+
+ // Get the mode
+ struct vgamode_s *vmode_g = get_current_mode();
+ if (!vmode_g)
+ return;
+
+ vgafb_set_swcursor(0);
+
+ // Calculate memory address of start of page
+ struct cursorpos cp = {0, 0, page};
+ int address = (int)text_address(cp);
+ vgahw_set_displaystart(vmode_g, address);
+
+ // And change the BIOS page
+ SET_BDA(video_pagestart, address);
+ SET_BDA(video_page, page);
+
+ dprintf(1, "Set active page %02x address %04x\n", page, address);
+
+ // Display the cursor, now the page is active
+ set_cursor_pos(get_cursor_pos(page));
+}
+
+static void
+set_scan_lines(u8 lines)
+{
+ stdvga_set_scan_lines(lines);
+ SET_BDA(char_height, lines);
+ u16 vde = stdvga_get_vde();
+ u8 rows = vde / lines;
+ SET_BDA(video_rows, rows - 1);
+ u16 cols = GET_BDA(video_cols);
+ SET_BDA(video_pagesize, calc_page_size(MM_TEXT, cols, rows));
+ if (lines == 8)
+ set_cursor_shape(0x0607);
+ else
+ set_cursor_shape(((lines - 3) << 8) | (lines - 2));
+}
+
+
+/****************************************************************
+ * Character writing
+ ****************************************************************/
+
+// Write a character to the screen and calculate new cursor position.
+static void
+write_char(struct cursorpos *pcp, struct carattr ca)
+{
+ vgafb_write_char(*pcp, ca);
+ pcp->x++;
+ // Do we need to wrap ?
+ if (pcp->x == GET_BDA(video_cols)) {
+ pcp->x = 0;
+ pcp->y++;
+ }
+}
+
+// Write a character to the screen at a given position. Implement
+// special characters and scroll the screen if necessary.
+static void
+write_teletype(struct cursorpos *pcp, struct carattr ca)
+{
+ switch (ca.car) {
+ case 7:
+ //FIXME should beep
+ break;
+ case 8:
+ if (pcp->x > 0)
+ pcp->x--;
+ break;
+ case '\r':
+ pcp->x = 0;
+ break;
+ case '\n':
+ pcp->y++;
+ break;
+ default:
+ write_char(pcp, ca);
+ break;
+ }
+
+ // Do we need to scroll ?
+ u16 nbrows = GET_BDA(video_rows);
+ if (pcp->y > nbrows) {
+ pcp->y--;
+
+ struct cursorpos dest = {0, 0, pcp->page};
+ struct cursorpos src = {0, 1, pcp->page};
+ struct cursorpos size = {GET_BDA(video_cols), nbrows};
+ vgafb_move_chars(dest, src, size);
+
+ struct cursorpos clr = {0, nbrows, pcp->page};
+ struct carattr attr = {' ', 0, 0};
+ struct cursorpos clrsize = {GET_BDA(video_cols), 1};
+ vgafb_clear_chars(clr, attr, clrsize);
+ }
+}
+
+
+/****************************************************************
+ * Save and restore bda state
+ ****************************************************************/
+
+struct saveBDAstate {
+ u8 bda_0x49[28];
+ u8 bda_0x84[6];
+ u16 vbe_mode;
+ struct segoff_s font0;
+ struct segoff_s font1;
+};
+
+int
+bda_save_restore(int cmd, u16 seg, void *data)
+{
+ if (!(cmd & SR_BDA))
+ return 0;
+ struct saveBDAstate *info = data;
+ if (cmd & SR_SAVE) {
+ memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49
+ , sizeof(info->bda_0x49));
+ memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84
+ , sizeof(info->bda_0x84));
+ SET_FARVAR(seg, info->vbe_mode, GET_BDA_EXT(vbe_mode));
+ SET_FARVAR(seg, info->font0, GET_IVT(0x1f));
+ SET_FARVAR(seg, info->font1, GET_IVT(0x43));
+ }
+ if (cmd & SR_RESTORE) {
+ memcpy_far(SEG_BDA, (void*)0x49, seg, info->bda_0x49
+ , sizeof(info->bda_0x49));
+ memcpy_far(SEG_BDA, (void*)0x84, seg, info->bda_0x84
+ , sizeof(info->bda_0x84));
+ u16 vbe_mode = GET_FARVAR(seg, info->vbe_mode);
+ SET_BDA_EXT(vbe_mode, vbe_mode);
+ struct vgamode_s *vmode_g = vgahw_find_mode(vbe_mode & ~MF_VBEFLAGS);
+ SET_BDA_EXT(vgamode_offset, (u32)vmode_g);
+ SET_IVT(0x1f, GET_FARVAR(seg, info->font0));
+ SET_IVT(0x43, GET_FARVAR(seg, info->font1));
+ }
+ return sizeof(*info);
+}
+
+
+/****************************************************************
+ * Mode setting
+ ****************************************************************/
+
+struct vgamode_s *
+get_current_mode(void)
+{
+ return (void*)(GET_BDA_EXT(vgamode_offset)+0);
+}
+
+// Setup BDA after a mode switch.
+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;
+
+ vgafb_set_swcursor(0);
+
+ 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);
+ if (mode < 0x100)
+ SET_BDA(video_mode, mode);
+ else
+ SET_BDA(video_mode, 0xff);
+ SET_BDA_EXT(vbe_mode, mode | (flags & MF_VBEFLAGS));
+ SET_BDA_EXT(vgamode_offset, (u32)vmode_g);
+ if (memmodel == MM_TEXT) {
+ SET_BDA(video_cols, width);
+ SET_BDA(video_rows, height-1);
+ SET_BDA(cursor_type, 0x0607);
+ } else {
+ int cwidth = GET_GLOBAL(vmode_g->cwidth);
+ SET_BDA(video_cols, width / cwidth);
+ SET_BDA(video_rows, (height / cheight) - 1);
+ SET_BDA(cursor_type, vga_emulate_text() ? 0x0607 : 0x0000);
+ }
+ SET_BDA(video_pagesize, calc_page_size(memmodel, width, height));
+ SET_BDA(crtc_address, CONFIG_VGA_STDVGA_PORTS ? stdvga_get_crtc() : 0);
+ SET_BDA(char_height, cheight);
+ SET_BDA(video_ctl, 0x60 | (flags & MF_NOCLEARMEM ? 0x80 : 0x00));
+ SET_BDA(video_switches, 0xF9);
+ SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f);
+ int i;
+ for (i=0; i<8; i++)
+ SET_BDA(cursor_pos[i], 0x0000);
+ SET_BDA(video_pagestart, 0x0000);
+ SET_BDA(video_page, 0x00);
+
+ // Set the ints 0x1F and 0x43
+ SET_IVT(0x1f, SEGOFF(get_global_seg(), (u32)&vgafont8[128 * 8]));
+
+ switch (cheight) {
+ case 8:
+ SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont8));
+ break;
+ case 14:
+ SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont14));
+ break;
+ case 16:
+ SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont16));
+ break;
+ }
+
+ return 0;
+}
+
+
+/****************************************************************
+ * VGA int 10 handler
+ ****************************************************************/
+
+static void
+handle_1000(struct bregs *regs)
+{
+ int mode = regs->al & 0x7f;
+
+ // Set regs->al
+ if (mode > 7)
+ regs->al = 0x20;
+ else if (mode == 6)
+ regs->al = 0x3f;
+ else
+ regs->al = 0x30;
+
+ int flags = MF_LEGACY | (GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM));
+ if (regs->al & 0x80)
+ flags |= MF_NOCLEARMEM;
+
+ vga_set_mode(mode, flags);
+}
+
+static void
+handle_1001(struct bregs *regs)
+{
+ set_cursor_shape(regs->cx);
+}
+
+static void
+handle_1002(struct bregs *regs)
+{
+ struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
+ set_cursor_pos(cp);
+}
+
+static void
+handle_1003(struct bregs *regs)
+{
+ regs->cx = GET_BDA(cursor_type);
+ struct cursorpos cp = get_cursor_pos(regs->bh);
+ regs->dl = cp.x;
+ regs->dh = cp.y;
+}
+
+// Read light pen pos (unimplemented)
+static void
+handle_1004(struct bregs *regs)
+{
+ debug_stub(regs);
+ regs->ax = regs->bx = regs->cx = regs->dx = 0;
+}
+
+static void
+handle_1005(struct bregs *regs)
+{
+ set_active_page(regs->al);
+}
+
+static void
+verify_scroll(struct bregs *regs, int dir)
+{
+ u8 ulx = regs->cl, uly = regs->ch, lrx = regs->dl, lry = regs->dh;
+ u16 nbrows = GET_BDA(video_rows) + 1;
+ if (lry >= nbrows)
+ lry = nbrows - 1;
+ u16 nbcols = GET_BDA(video_cols);
+ if (lrx >= nbcols)
+ lrx = nbcols - 1;
+ int wincols = lrx - ulx + 1, winrows = lry - uly + 1;
+ if (wincols <= 0 || winrows <= 0)
+ return;
+
+ u8 page = GET_BDA(video_page);
+ int clearlines = regs->al, movelines = winrows - clearlines;
+ if (!clearlines || movelines <= 0) {
+ // Clear whole area.
+ struct cursorpos clr = {ulx, uly, page};
+ struct carattr attr = {' ', regs->bh, 1};
+ struct cursorpos clrsize = {wincols, winrows};
+ vgafb_clear_chars(clr, attr, clrsize);
+ return;
+ }
+
+ if (dir > 0) {
+ // Normal scroll
+ struct cursorpos dest = {ulx, uly, page};
+ struct cursorpos src = {ulx, uly + clearlines, page};
+ struct cursorpos size = {wincols, movelines};
+ vgafb_move_chars(dest, src, size);
+
+ struct cursorpos clr = {ulx, uly + movelines, page};
+ struct carattr attr = {' ', regs->bh, 1};
+ struct cursorpos clrsize = {wincols, clearlines};
+ vgafb_clear_chars(clr, attr, clrsize);
+ } else {
+ // Scroll down
+ struct cursorpos dest = {ulx, uly + clearlines, page};
+ struct cursorpos src = {ulx, uly, page};
+ struct cursorpos size = {wincols, movelines};
+ vgafb_move_chars(dest, src, size);
+
+ struct cursorpos clr = {ulx, uly, page};
+ struct carattr attr = {' ', regs->bh, 1};
+ struct cursorpos clrsize = {wincols, clearlines};
+ vgafb_clear_chars(clr, attr, clrsize);
+ }
+}
+
+static void
+handle_1006(struct bregs *regs)
+{
+ verify_scroll(regs, 1);
+}
+
+static void
+handle_1007(struct bregs *regs)
+{
+ verify_scroll(regs, -1);
+}
+
+static void
+handle_1008(struct bregs *regs)
+{
+ struct carattr ca = vgafb_read_char(get_cursor_pos(regs->bh));
+ regs->al = ca.car;
+ regs->ah = ca.attr;
+}
+
+static void noinline
+handle_1009(struct bregs *regs)
+{
+ struct carattr ca = {regs->al, regs->bl, 1};
+ struct cursorpos cp = get_cursor_pos(regs->bh);
+ int count = regs->cx;
+ while (count--)
+ write_char(&cp, ca);
+}
+
+static void noinline
+handle_100a(struct bregs *regs)
+{
+ struct carattr ca = {regs->al, regs->bl, 0};
+ struct cursorpos cp = get_cursor_pos(regs->bh);
+ int count = regs->cx;
+ while (count--)
+ write_char(&cp, ca);
+}
+
+
+static void
+handle_100b00(struct bregs *regs)
+{
+ stdvga_set_border_color(regs->bl);
+}
+
+static void
+handle_100b01(struct bregs *regs)
+{
+ stdvga_set_palette(regs->bl);
+}
+
+static void
+handle_100bXX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+static void
+handle_100b(struct bregs *regs)
+{
+ if (!CONFIG_VGA_STDVGA_PORTS) {
+ handle_100bXX(regs);
+ return;
+ }
+ switch (regs->bh) {
+ case 0x00: handle_100b00(regs); break;
+ case 0x01: handle_100b01(regs); break;
+ default: handle_100bXX(regs); break;
+ }
+}
+
+
+static void
+handle_100c(struct bregs *regs)
+{
+ // XXX - page (regs->bh) is unused
+ vgafb_write_pixel(regs->al, regs->cx, regs->dx);
+}
+
+static void
+handle_100d(struct bregs *regs)
+{
+ // XXX - page (regs->bh) is unused
+ regs->al = vgafb_read_pixel(regs->cx, regs->dx);
+}
+
+static void noinline
+handle_100e(struct bregs *regs)
+{
+ // Ralf Brown Interrupt list is WRONG on bh(page)
+ // We do output only on the current page !
+ struct carattr ca = {regs->al, regs->bl, 0};
+ struct cursorpos cp = get_cursor_pos(0xff);
+ write_teletype(&cp, ca);
+ set_cursor_pos(cp);
+}
+
+static void
+handle_100f(struct bregs *regs)
+{
+ regs->bh = GET_BDA(video_page);
+ regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
+ regs->ah = GET_BDA(video_cols);
+}
+
+
+static void
+handle_101000(struct bregs *regs)
+{
+ if (regs->bl > 0x14)
+ return;
+ stdvga_attr_write(regs->bl, regs->bh);
+}
+
+static void
+handle_101001(struct bregs *regs)
+{
+ stdvga_set_overscan_border_color(regs->bh);
+}
+
+static void
+handle_101002(struct bregs *regs)
+{
+ stdvga_set_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
+}
+
+static void
+handle_101003(struct bregs *regs)
+{
+ stdvga_toggle_intensity(regs->bl);
+}
+
+static void
+handle_101007(struct bregs *regs)
+{
+ if (regs->bl > 0x14)
+ return;
+ regs->bh = stdvga_attr_read(regs->bl);
+}
+
+static void
+handle_101008(struct bregs *regs)
+{
+ regs->bh = stdvga_get_overscan_border_color();
+}
+
+static void
+handle_101009(struct bregs *regs)
+{
+ stdvga_get_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
+}
+
+static void noinline
+handle_101010(struct bregs *regs)
+{
+ u8 rgb[3] = {regs->dh, regs->ch, regs->cl};
+ stdvga_dac_write(GET_SEG(SS), rgb, regs->bx, 1);
+}
+
+static void
+handle_101012(struct bregs *regs)
+{
+ stdvga_dac_write(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
+}
+
+static void
+handle_101013(struct bregs *regs)
+{
+ stdvga_select_video_dac_color_page(regs->bl, regs->bh);
+}
+
+static void noinline
+handle_101015(struct bregs *regs)
+{
+ u8 rgb[3];
+ stdvga_dac_read(GET_SEG(SS), rgb, regs->bx, 1);
+ regs->dh = rgb[0];
+ regs->ch = rgb[1];
+ regs->cl = rgb[2];
+}
+
+static void
+handle_101017(struct bregs *regs)
+{
+ stdvga_dac_read(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
+}
+
+static void
+handle_101018(struct bregs *regs)
+{
+ stdvga_pelmask_write(regs->bl);
+}
+
+static void
+handle_101019(struct bregs *regs)
+{
+ regs->bl = stdvga_pelmask_read();
+}
+
+static void
+handle_10101a(struct bregs *regs)
+{
+ stdvga_read_video_dac_state(®s->bl, ®s->bh);
+}
+
+static void
+handle_10101b(struct bregs *regs)
+{
+ stdvga_perform_gray_scale_summing(regs->bx, regs->cx);
+}
+
+static void
+handle_1010XX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+static void
+handle_1010(struct bregs *regs)
+{
+ if (!CONFIG_VGA_STDVGA_PORTS) {
+ handle_1010XX(regs);
+ return;
+ }
+ switch (regs->al) {
+ case 0x00: handle_101000(regs); break;
+ case 0x01: handle_101001(regs); break;
+ case 0x02: handle_101002(regs); break;
+ case 0x03: handle_101003(regs); break;
+ case 0x07: handle_101007(regs); break;
+ case 0x08: handle_101008(regs); break;
+ case 0x09: handle_101009(regs); break;
+ case 0x10: handle_101010(regs); break;
+ case 0x12: handle_101012(regs); break;
+ case 0x13: handle_101013(regs); break;
+ case 0x15: handle_101015(regs); break;
+ case 0x17: handle_101017(regs); break;
+ case 0x18: handle_101018(regs); break;
+ case 0x19: handle_101019(regs); break;
+ case 0x1a: handle_10101a(regs); break;
+ case 0x1b: handle_10101b(regs); break;
+ default: handle_1010XX(regs); break;
+ }
+}
+
+
+static void
+handle_101100(struct bregs *regs)
+{
+ stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+ , regs->dx, regs->bl, regs->bh);
+}
+
+static void
+handle_101101(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
+}
+
+static void
+handle_101102(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
+}
+
+static void
+handle_101103(struct bregs *regs)
+{
+ stdvga_set_text_block_specifier(regs->bl);
+}
+
+static void
+handle_101104(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
+}
+
+static void
+handle_101110(struct bregs *regs)
+{
+ stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+ , regs->dx, regs->bl, regs->bh);
+ set_scan_lines(regs->bh);
+}
+
+static void
+handle_101111(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
+ set_scan_lines(14);
+}
+
+static void
+handle_101112(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
+ set_scan_lines(8);
+}
+
+static void
+handle_101114(struct bregs *regs)
+{
+ stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
+ set_scan_lines(16);
+}
+
+static void
+handle_101120(struct bregs *regs)
+{
+ SET_IVT(0x1f, SEGOFF(regs->es, regs->bp));
+}
+
+void
+load_gfx_font(u16 seg, u16 off, u8 height, u8 bl, u8 dl)
+{
+ u8 rows;
+
+ SET_IVT(0x43, SEGOFF(seg, off));
+ switch(bl) {
+ case 0:
+ rows = dl;
+ break;
+ case 1:
+ rows = 14;
+ break;
+ case 3:
+ rows = 43;
+ break;
+ case 2:
+ default:
+ rows = 25;
+ break;
+ }
+ SET_BDA(video_rows, rows - 1);
+ SET_BDA(char_height, height);
+}
+
+static void
+handle_101121(struct bregs *regs)
+{
+ load_gfx_font(regs->es, regs->bp, regs->cx, regs->bl, regs->dl);
+}
+
+static void
+handle_101122(struct bregs *regs)
+{
+ load_gfx_font(get_global_seg(), (u32)vgafont14, 14, regs->bl, regs->dl);
+}
+
+static void
+handle_101123(struct bregs *regs)
+{
+ load_gfx_font(get_global_seg(), (u32)vgafont8, 8, regs->bl, regs->dl);
+}
+
+static void
+handle_101124(struct bregs *regs)
+{
+ load_gfx_font(get_global_seg(), (u32)vgafont16, 16, regs->bl, regs->dl);
+}
+
+static void
+handle_101130(struct bregs *regs)
+{
+ switch (regs->bh) {
+ case 0x00: {
+ struct segoff_s so = GET_IVT(0x1f);
+ regs->es = so.seg;
+ regs->bp = so.offset;
+ break;
+ }
+ case 0x01: {
+ struct segoff_s so = GET_IVT(0x43);
+ regs->es = so.seg;
+ regs->bp = so.offset;
+ break;
+ }
+ case 0x02:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont14;
+ break;
+ case 0x03:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont8;
+ break;
+ case 0x04:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont8 + 128 * 8;
+ break;
+ case 0x05:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont14alt;
+ break;
+ case 0x06:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont16;
+ break;
+ case 0x07:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont16alt;
+ break;
+ default:
+ dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh);
+ return;
+ }
+ // Set byte/char of on screen font
+ regs->cx = GET_BDA(char_height) & 0xff;
+
+ // Set Highest char row
+ regs->dl = GET_BDA(video_rows);
+}
+
+static void
+handle_1011XX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+static void
+handle_1011(struct bregs *regs)
+{
+ if (CONFIG_VGA_STDVGA_PORTS) {
+ switch (regs->al) {
+ case 0x00: handle_101100(regs); return;
+ case 0x01: handle_101101(regs); return;
+ case 0x02: handle_101102(regs); return;
+ case 0x03: handle_101103(regs); return;
+ case 0x04: handle_101104(regs); return;
+ case 0x10: handle_101110(regs); return;
+ case 0x11: handle_101111(regs); return;
+ case 0x12: handle_101112(regs); return;
+ case 0x14: handle_101114(regs); return;
+ }
+ }
+ switch (regs->al) {
+ case 0x30: handle_101130(regs); break;
+ case 0x20: handle_101120(regs); break;
+ case 0x21: handle_101121(regs); break;
+ case 0x22: handle_101122(regs); break;
+ case 0x23: handle_101123(regs); break;
+ case 0x24: handle_101124(regs); break;
+ default: handle_1011XX(regs); break;
+ }
+}
+
+
+static void
+handle_101210(struct bregs *regs)
+{
+ u16 crtc_addr = GET_BDA(crtc_address);
+ if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS)
+ regs->bx = 0x0103;
+ else
+ regs->bx = 0x0003;
+ regs->cx = GET_BDA(video_switches) & 0x0f;
+}
+
+static void
+handle_101230(struct bregs *regs)
+{
+ u8 mctl = GET_BDA(modeset_ctl);
+ u8 vswt = GET_BDA(video_switches);
+ switch (regs->al) {
+ case 0x00:
+ // 200 lines
+ mctl = (mctl & ~0x10) | 0x80;
+ vswt = (vswt & ~0x0f) | 0x08;
+ break;
+ case 0x01:
+ // 350 lines
+ mctl &= ~0x90;
+ vswt = (vswt & ~0x0f) | 0x09;
+ break;
+ case 0x02:
+ // 400 lines
+ mctl = (mctl & ~0x80) | 0x10;
+ vswt = (vswt & ~0x0f) | 0x09;
+ break;
+ default:
+ dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
+ break;
+ }
+ SET_BDA(modeset_ctl, mctl);
+ SET_BDA(video_switches, vswt);
+ regs->al = 0x12;
+}
+
+static void
+handle_101231(struct bregs *regs)
+{
+ u8 v = (regs->al & 0x01) << 3;
+ u8 mctl = GET_BDA(video_ctl) & ~0x08;
+ SET_BDA(video_ctl, mctl | v);
+ regs->al = 0x12;
+}
+
+static void
+handle_101232(struct bregs *regs)
+{
+ if (CONFIG_VGA_STDVGA_PORTS) {
+ stdvga_enable_video_addressing(regs->al);
+ regs->al = 0x12;
+ }
+}
+
+static void
+handle_101233(struct bregs *regs)
+{
+ u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
+ u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
+ SET_BDA(modeset_ctl, v | v2);
+ regs->al = 0x12;
+}
+
+static void
+handle_101234(struct bregs *regs)
+{
+ SET_BDA(video_ctl, (GET_BDA(video_ctl) & ~0x01) | (regs->al & 0x01));
+ regs->al = 0x12;
+}
+
+static void
+handle_101235(struct bregs *regs)
+{
+ debug_stub(regs);
+ regs->al = 0x12;
+}
+
+static void
+handle_101236(struct bregs *regs)
+{
+ debug_stub(regs);
+ regs->al = 0x12;
+}
+
+static void
+handle_1012XX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+static void
+handle_1012(struct bregs *regs)
+{
+ if (CONFIG_VGA_CIRRUS && regs->bl >= 0x80) {
+ clext_1012(regs);
+ return;
+ }
+
+ switch (regs->bl) {
+ case 0x10: handle_101210(regs); break;
+ case 0x30: handle_101230(regs); break;
+ case 0x31: handle_101231(regs); break;
+ case 0x32: handle_101232(regs); break;
+ case 0x33: handle_101233(regs); break;
+ case 0x34: handle_101234(regs); break;
+ case 0x35: handle_101235(regs); break;
+ case 0x36: handle_101236(regs); break;
+ default: handle_1012XX(regs); break;
+ }
+}
+
+
+// Write string
+static void noinline
+handle_1013(struct bregs *regs)
+{
+ struct cursorpos cp;
+ if (regs->dh == 0xff)
+ // if row=0xff special case : use current cursor position
+ cp = get_cursor_pos(regs->bh);
+ else
+ cp = (struct cursorpos) {regs->dl, regs->dh, regs->bh};
+
+ u16 count = regs->cx;
+ u8 *offset_far = (void*)(regs->bp + 0);
+ u8 attr = regs->bl;
+ while (count--) {
+ u8 car = GET_FARVAR(regs->es, *offset_far);
+ offset_far++;
+ if (regs->al & 2) {
+ attr = GET_FARVAR(regs->es, *offset_far);
+ offset_far++;
+ }
+
+ struct carattr ca = {car, attr, 1};
+ write_teletype(&cp, ca);
+ }
+
+ if (regs->al & 1)
+ set_cursor_pos(cp);
+}
+
+
+static void
+handle_101a00(struct bregs *regs)
+{
+ regs->bx = GET_BDA(dcc_index);
+ regs->al = 0x1a;
+}
+
+static void
+handle_101a01(struct bregs *regs)
+{
+ SET_BDA(dcc_index, regs->bl);
+ dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
+ regs->al = 0x1a;
+}
+
+static void
+handle_101aXX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+static void
+handle_101a(struct bregs *regs)
+{
+ switch (regs->al) {
+ case 0x00: handle_101a00(regs); break;
+ case 0x01: handle_101a01(regs); break;
+ default: handle_101aXX(regs); break;
+ }
+}
+
+
+struct video_func_static static_functionality VAR16 = {
+ .modes = 0x00, // Filled in by stdvga_build_video_param()
+ .scanlines = 0x07, // 200, 350, 400 scan lines
+ .cblocks = 0x02, // mamimum number of visible charsets in text mode
+ .active_cblocks = 0x08, // total number of charset blocks in text mode
+ .misc_flags = 0x0ce7,
+};
+
+static void
+handle_101b(struct bregs *regs)
+{
+ u16 seg = regs->es;
+ struct video_func_info *info = (void*)(regs->di+0);
+ memset_far(seg, info, 0, sizeof(*info));
+ // Address of static functionality table
+ SET_FARVAR(seg, info->static_functionality
+ , SEGOFF(get_global_seg(), (u32)&static_functionality));
+
+ // Hard coded copy from BIOS area. Should it be cleaner ?
+ memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49
+ , sizeof(info->bda_0x49));
+ memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84
+ , sizeof(info->bda_0x84));
+
+ SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index));
+ SET_FARVAR(seg, info->colors, 16);
+ SET_FARVAR(seg, info->pages, 8);
+ SET_FARVAR(seg, info->scan_lines, 2);
+ SET_FARVAR(seg, info->video_mem, 3);
+ regs->al = 0x1B;
+}
+
+
+static void
+handle_101c(struct bregs *regs)
+{
+ u16 seg = regs->es;
+ void *data = (void*)(regs->bx+0);
+ u16 states = regs->cx;
+ u8 cmd = regs->al;
+ if (states & ~0x07 || cmd > 2)
+ goto fail;
+ int ret = vgahw_save_restore(states | (cmd<<8), seg, data);
+ if (ret < 0)
+ goto fail;
+ if (cmd == 0)
+ regs->bx = ret / 64;
+ regs->al = 0x1c;
+fail:
+ return;
+}
+
+static void
+handle_10XX(struct bregs *regs)
+{
+ debug_stub(regs);
+}
+
+// INT 10h Video Support Service Entry Point
+void VISIBLE16
+handle_10(struct bregs *regs)
+{
+ debug_enter(regs, DEBUG_VGA_10);
+ switch (regs->ah) {
+ case 0x00: handle_1000(regs); break;
+ case 0x01: handle_1001(regs); break;
+ case 0x02: handle_1002(regs); break;
+ case 0x03: handle_1003(regs); break;
+ case 0x04: handle_1004(regs); break;
+ case 0x05: handle_1005(regs); break;
+ case 0x06: handle_1006(regs); break;
+ case 0x07: handle_1007(regs); break;
+ case 0x08: handle_1008(regs); break;
+ case 0x09: handle_1009(regs); break;
+ case 0x0a: handle_100a(regs); break;
+ case 0x0b: handle_100b(regs); break;
+ case 0x0c: handle_100c(regs); break;
+ case 0x0d: handle_100d(regs); break;
+ case 0x0e: handle_100e(regs); break;
+ case 0x0f: handle_100f(regs); break;
+ case 0x10: handle_1010(regs); break;
+ case 0x11: handle_1011(regs); break;
+ case 0x12: handle_1012(regs); break;
+ case 0x13: handle_1013(regs); break;
+ case 0x1a: handle_101a(regs); break;
+ case 0x1b: handle_101b(regs); break;
+ case 0x1c: handle_101c(regs); break;
+ case 0x4f: handle_104f(regs); break;
+ default: handle_10XX(regs); break;
+ }
+}
Code Review / kvmfornfv.git / blobdiff