X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=vgasrc%2Fclext.c;h=0470d80a548329d3ad2df1a8b691309971efd7ad;hb=cfd7ef9d8b38d9706671a4e88d40dcc4ac922b6a;hp=413add53586fffe3d2b321423923e9a6f22a2bfc;hpb=97cc354a0223ad4241e657f69dc13ffed2694ee8;p=seabios.git

diff --git a/vgasrc/clext.c b/vgasrc/clext.c
index 413add5..0470d80 100644
--- a/vgasrc/clext.c
+++ b/vgasrc/clext.c
@@ -10,14 +10,13 @@
 #include "biosvar.h" // GET_GLOBAL
 #include "util.h" // dprintf
 #include "bregs.h" // struct bregs
-#include "vbe.h" // struct vbe_info
 #include "stdvga.h" // VGAREG_SEQU_ADDRESS
 #include "pci.h" // pci_config_readl
 #include "pci_regs.h" // PCI_BASE_ADDRESS_0
 
 
 /****************************************************************
- * tables
+ * Cirrus mode tables
  ****************************************************************/
 
 /* VGA */
@@ -217,7 +216,7 @@ static u16 ccrtc_1600x1200x8[] VAR16 = {
 };
 
 struct cirrus_mode_s {
-    u16 mode;
+    u16 mode, vesamode;
     struct vgamode_s info;
 
     u16 hidden_dac; /* 0x3c6 */
@@ -227,123 +226,153 @@ struct cirrus_mode_s {
 };
 
 static struct cirrus_mode_s cirrus_modes[] VAR16 = {
-    {0x5f,{MM_PACKED,640,480,8},0x00,
+    {0x5f,0x101,{MM_PACKED,640,480,8,8,16,SEG_GRAPH},0x00,
      cseq_640x480x8,cgraph_svgacolor,ccrtc_640x480x8},
-    {0x64,{MM_DIRECT,640,480,16},0xe1,
+    {0x64,0x111,{MM_DIRECT,640,480,16,8,16,SEG_GRAPH},0xe1,
      cseq_640x480x16,cgraph_svgacolor,ccrtc_640x480x16},
-    {0x66,{MM_DIRECT,640,480,15},0xf0,
+    {0x66,0x110,{MM_DIRECT,640,480,15,8,16,SEG_GRAPH},0xf0,
      cseq_640x480x16,cgraph_svgacolor,ccrtc_640x480x16},
-    {0x71,{MM_DIRECT,640,480,24},0xe5,
+    {0x71,0x112,{MM_DIRECT,640,480,24,8,16,SEG_GRAPH},0xe5,
      cseq_640x480x24,cgraph_svgacolor,ccrtc_640x480x24},
 
-    {0x5c,{MM_PACKED,800,600,8},0x00,
+    {0x5c,0x103,{MM_PACKED,800,600,8,8,16,SEG_GRAPH},0x00,
      cseq_800x600x8,cgraph_svgacolor,ccrtc_800x600x8},
-    {0x65,{MM_DIRECT,800,600,16},0xe1,
+    {0x65,0x114,{MM_DIRECT,800,600,16,8,16,SEG_GRAPH},0xe1,
      cseq_800x600x16,cgraph_svgacolor,ccrtc_800x600x16},
-    {0x67,{MM_DIRECT,800,600,15},0xf0,
+    {0x67,0x113,{MM_DIRECT,800,600,15,8,16,SEG_GRAPH},0xf0,
      cseq_800x600x16,cgraph_svgacolor,ccrtc_800x600x16},
 
-    {0x60,{MM_PACKED,1024,768,8},0x00,
+    {0x60,0x105,{MM_PACKED,1024,768,8,8,16,SEG_GRAPH},0x00,
      cseq_1024x768x8,cgraph_svgacolor,ccrtc_1024x768x8},
-    {0x74,{MM_DIRECT,1024,768,16},0xe1,
+    {0x74,0x117,{MM_DIRECT,1024,768,16,8,16,SEG_GRAPH},0xe1,
      cseq_1024x768x16,cgraph_svgacolor,ccrtc_1024x768x16},
-    {0x68,{MM_DIRECT,1024,768,15},0xf0,
+    {0x68,0x116,{MM_DIRECT,1024,768,15,8,16,SEG_GRAPH},0xf0,
      cseq_1024x768x16,cgraph_svgacolor,ccrtc_1024x768x16},
 
-    {0x78,{MM_DIRECT,800,600,24},0xe5,
+    {0x78,0x115,{MM_DIRECT,800,600,24,8,16,SEG_GRAPH},0xe5,
      cseq_800x600x24,cgraph_svgacolor,ccrtc_800x600x24},
-    {0x79,{MM_DIRECT,1024,768,24},0xe5,
+    {0x79,0x118,{MM_DIRECT,1024,768,24,8,16,SEG_GRAPH},0xe5,
      cseq_1024x768x24,cgraph_svgacolor,ccrtc_1024x768x24},
 
-    {0x6d,{MM_PACKED,1280,1024,8},0x00,
+    {0x6d,0x107,{MM_PACKED,1280,1024,8,8,16,SEG_GRAPH},0x00,
      cseq_1280x1024x8,cgraph_svgacolor,ccrtc_1280x1024x8},
-    {0x69,{MM_DIRECT,1280,1024,15},0xf0,
+    {0x69,0x119,{MM_DIRECT,1280,1024,15,8,16,SEG_GRAPH},0xf0,
      cseq_1280x1024x16,cgraph_svgacolor,ccrtc_1280x1024x16},
-    {0x75,{MM_DIRECT,1280,1024,16},0xe1,
+    {0x75,0x11a,{MM_DIRECT,1280,1024,16,8,16,SEG_GRAPH},0xe1,
      cseq_1280x1024x16,cgraph_svgacolor,ccrtc_1280x1024x16},
 
-    {0x7b,{MM_PACKED,1600,1200,8},0x00,
+    {0x7b,0xffff,{MM_PACKED,1600,1200,8,8,16,SEG_GRAPH},0x00,
      cseq_1600x1200x8,cgraph_svgacolor,ccrtc_1600x1200x8},
 };
 
 static struct cirrus_mode_s mode_switchback VAR16 =
-    {0xfe,{0xff},0,cseq_vga,cgraph_vga,ccrtc_vga};
-
-static struct {
-    u16 vesamode, mode;
-} cirrus_vesa_modelist[] VAR16 = {
-    // 640x480x8
-    { 0x101, 0x5f },
-    // 640x480x15
-    { 0x110, 0x66 },
-    // 640x480x16
-    { 0x111, 0x64 },
-    // 640x480x24
-    { 0x112, 0x71 },
-    // 800x600x8
-    { 0x103, 0x5c },
-    // 800x600x15
-    { 0x113, 0x67 },
-    // 800x600x16
-    { 0x114, 0x65 },
-    // 800x600x24
-    { 0x115, 0x78 },
-    // 1024x768x8
-    { 0x105, 0x60 },
-    // 1024x768x15
-    { 0x116, 0x68 },
-    // 1024x768x16
-    { 0x117, 0x74 },
-    // 1024x768x24
-    { 0x118, 0x79 },
-    // 1280x1024x8
-    { 0x107, 0x6d },
-    // 1280x1024x15
-    { 0x119, 0x69 },
-    // 1280x1024x16
-    { 0x11a, 0x75 },
-};
+    {0xfe,0xffff,{0xff},0,cseq_vga,cgraph_vga,ccrtc_vga};
+
+int
+is_cirrus_mode(struct vgamode_s *vmode_g)
+{
+    return (vmode_g >= &cirrus_modes[0].info
+            && vmode_g <= &cirrus_modes[ARRAY_SIZE(cirrus_modes)-1].info);
+}
+
+struct vgamode_s *
+clext_find_mode(int mode)
+{
+    struct cirrus_mode_s *table_g = cirrus_modes;
+    while (table_g < &cirrus_modes[ARRAY_SIZE(cirrus_modes)]) {
+        if (GET_GLOBAL(table_g->mode) == mode
+            || GET_GLOBAL(table_g->vesamode) == mode)
+            return &table_g->info;
+        table_g++;
+    }
+    return stdvga_find_mode(mode);
+}
+
+void
+clext_list_modes(u16 seg, u16 *dest, u16 *last)
+{
+    int i;
+    for (i=0; i<ARRAY_SIZE(cirrus_modes) && dest<last; i++) {
+        u16 mode = GET_GLOBAL(cirrus_modes[i].vesamode);
+        if (mode == 0xffff)
+            continue;
+        SET_FARVAR(seg, *dest, mode);
+        dest++;
+    }
+    stdvga_list_modes(seg, dest, last);
+}
 
 
 /****************************************************************
  * helper functions
  ****************************************************************/
 
-static u16
-cirrus_vesamode_to_mode(u16 vesamode)
+int
+clext_get_window(struct vgamode_s *vmode_g, int window)
 {
-    int i;
-    for (i=0; i<ARRAY_SIZE(cirrus_vesa_modelist); i++)
-        if (GET_GLOBAL(cirrus_vesa_modelist[i].vesamode) == vesamode)
-            return GET_GLOBAL(cirrus_vesa_modelist[i].mode);
+    return stdvga_grdc_read(window + 9);
+}
+
+int
+clext_set_window(struct vgamode_s *vmode_g, int window, int val)
+{
+    if (val >= 0x100)
+        return -1;
+    stdvga_grdc_write(window + 9, val);
     return 0;
 }
 
-static struct cirrus_mode_s *
-cirrus_get_modeentry(int mode)
+int
+clext_get_linelength(struct vgamode_s *vmode_g)
 {
-    int transmode = cirrus_vesamode_to_mode(mode);
-    if (transmode)
-        mode = transmode;
-    struct cirrus_mode_s *table_g = cirrus_modes;
-    while (table_g < &cirrus_modes[ARRAY_SIZE(cirrus_modes)]) {
-        u16 tmode = GET_GLOBAL(table_g->mode);
-        if (tmode == mode)
-            return table_g;
-        table_g++;
-    }
-    return NULL;
+    u16 crtc_addr = stdvga_get_crtc();
+    u8 reg13 = stdvga_crtc_read(crtc_addr, 0x13);
+    u8 reg1b = stdvga_crtc_read(crtc_addr, 0x1b);
+    return (((reg1b & 0x10) << 4) + reg13) * stdvga_bpp_factor(vmode_g) * 2;
 }
 
-struct vgamode_s *
-clext_find_mode(int mode)
+int
+clext_set_linelength(struct vgamode_s *vmode_g, int val)
 {
-    struct cirrus_mode_s *table_g = cirrus_get_modeentry(mode);
-    if (table_g)
-        return &table_g->info;
-    return stdvga_find_mode(mode);
+    u16 crtc_addr = stdvga_get_crtc();
+    int factor = stdvga_bpp_factor(vmode_g) * 2;
+    int new_line_offset = DIV_ROUND_UP(val, factor);
+    stdvga_crtc_write(crtc_addr, 0x13, new_line_offset);
+    stdvga_crtc_mask(crtc_addr, 0x1b, 0x10, (new_line_offset & 0x100) >> 4);
+    return 0;
+}
+
+int
+clext_get_displaystart(struct vgamode_s *vmode_g)
+{
+    u16 crtc_addr = stdvga_get_crtc();
+    u8 b2 = stdvga_crtc_read(crtc_addr, 0x0c);
+    u8 b1 = stdvga_crtc_read(crtc_addr, 0x0d);
+    u8 b3 = stdvga_crtc_read(crtc_addr, 0x1b);
+    u8 b4 = stdvga_crtc_read(crtc_addr, 0x1d);
+    int val = (b1 | (b2<<8) | ((b3 & 0x01) << 16) | ((b3 & 0x0c) << 15)
+               | ((b4 & 0x80) << 12));
+    return val * stdvga_bpp_factor(vmode_g);
 }
 
+int
+clext_set_displaystart(struct vgamode_s *vmode_g, int val)
+{
+    u16 crtc_addr = stdvga_get_crtc();
+    val /= stdvga_bpp_factor(vmode_g);
+    stdvga_crtc_write(crtc_addr, 0x0d, val);
+    stdvga_crtc_write(crtc_addr, 0x0c, val >> 8);
+    stdvga_crtc_mask(crtc_addr, 0x1d, 0x80, (val & 0x0800) >> 4);
+    stdvga_crtc_mask(crtc_addr, 0x1b, 0x0d
+                     , ((val & 0x0100) >> 8) | ((val & 0x0600) >> 7));
+    return 0;
+}
+
+
+/****************************************************************
+ * Mode setting
+ ****************************************************************/
+
 static void
 cirrus_switch_mode_setregs(u16 *data, u16 port)
 {
@@ -360,92 +389,63 @@ static void
 cirrus_switch_mode(struct cirrus_mode_s *table)
 {
     // Unlock cirrus special
-    outw(0x1206, VGAREG_SEQU_ADDRESS);
+    stdvga_sequ_write(0x06, 0x12);
     cirrus_switch_mode_setregs(GET_GLOBAL(table->seq), VGAREG_SEQU_ADDRESS);
     cirrus_switch_mode_setregs(GET_GLOBAL(table->graph), VGAREG_GRDC_ADDRESS);
     cirrus_switch_mode_setregs(GET_GLOBAL(table->crtc), stdvga_get_crtc());
 
-    outb(0x00, VGAREG_PEL_MASK);
-    inb(VGAREG_PEL_MASK);
-    inb(VGAREG_PEL_MASK);
-    inb(VGAREG_PEL_MASK);
-    inb(VGAREG_PEL_MASK);
-    outb(GET_GLOBAL(table->hidden_dac), VGAREG_PEL_MASK);
-    outb(0xff, VGAREG_PEL_MASK);
+    stdvga_pelmask_write(0x00);
+    stdvga_pelmask_read();
+    stdvga_pelmask_read();
+    stdvga_pelmask_read();
+    stdvga_pelmask_read();
+    stdvga_pelmask_write(GET_GLOBAL(table->hidden_dac));
+    stdvga_pelmask_write(0xff);
 
     u8 memmodel = GET_GLOBAL(table->info.memmodel);
-    u8 v = stdvga_get_single_palette_reg(0x10) & 0xfe;
+    u8 on = 0;
     if (memmodel == MM_PLANAR)
-        v |= 0x41;
+        on = 0x41;
     else if (memmodel != MM_TEXT)
-        v |= 0x01;
-    stdvga_set_single_palette_reg(0x10, v);
-}
-
-static u8
-cirrus_get_memsize(void)
-{
-    // get DRAM band width
-    outb(0x0f, VGAREG_SEQU_ADDRESS);
-    u8 v = inb(VGAREG_SEQU_DATA);
-    u8 x = (v >> 3) & 0x03;
-    if (x == 0x03) {
-        if (v & 0x80)
-            // 4MB
-            return 0x40;
-        // 2MB
-        return 0x20;
-    }
-    return 0x04 << x;
+        on = 0x01;
+    stdvga_attr_mask(0x10, 0x01, on);
 }
 
 static void
 cirrus_enable_16k_granularity(void)
 {
-    outb(0x0b, VGAREG_GRDC_ADDRESS);
-    u8 v = inb(VGAREG_GRDC_DATA);
-    outb(v | 0x20, VGAREG_GRDC_DATA);
+    stdvga_grdc_mask(0x0b, 0x00, 0x20);
 }
 
 static void
-cirrus_clear_vram(u16 param)
+cirrus_clear_vram(void)
 {
     cirrus_enable_16k_granularity();
-    u8 count = cirrus_get_memsize() * 4;
+    u8 count = GET_GLOBAL(VBE_total_memory) / (16 * 1024);
     u8 i;
     for (i=0; i<count; i++) {
-        outw((i<<8) | 0x09, VGAREG_GRDC_ADDRESS);
-        memset16_far(SEG_GRAPH, 0, param, 16 * 1024);
+        stdvga_grdc_write(0x09, i);
+        memset16_far(SEG_GRAPH, 0, 0, 16 * 1024);
     }
-    outw(0x0009, VGAREG_GRDC_ADDRESS);
+    stdvga_grdc_write(0x09, 0x00);
 }
 
 int
-clext_set_mode(int mode, int flags)
+clext_set_mode(struct vgamode_s *vmode_g, int flags)
 {
-    dprintf(1, "cirrus mode %x\n", mode);
-    SET_BDA(vbe_mode, 0);
-    struct cirrus_mode_s *table_g = cirrus_get_modeentry(mode);
-    if (table_g) {
-        cirrus_switch_mode(table_g);
-        if (!(flags & MF_LINEARFB))
-            cirrus_enable_16k_granularity();
-        if (!(flags & MF_NOCLEARMEM))
-            cirrus_clear_vram(0);
-        SET_BDA(video_mode, mode);
-        SET_BDA(vbe_mode, mode | flags);
-        return 0;
+    if (!is_cirrus_mode(vmode_g)) {
+        cirrus_switch_mode(&mode_switchback);
+        dprintf(1, "cirrus mode switch regular\n");
+        return stdvga_set_mode(vmode_g, flags);
     }
-    cirrus_switch_mode(&mode_switchback);
-    dprintf(1, "cirrus mode switch regular\n");
-    return stdvga_set_mode(mode, flags);
-}
-
-static int
-cirrus_check(void)
-{
-    outw(0x9206, VGAREG_SEQU_ADDRESS);
-    return inb(VGAREG_SEQU_DATA) == 0x12;
+    struct cirrus_mode_s *table_g = container_of(
+        vmode_g, struct cirrus_mode_s, info);
+    cirrus_switch_mode(table_g);
+    if (!(flags & MF_LINEARFB))
+        cirrus_enable_16k_granularity();
+    if (!(flags & MF_NOCLEARMEM))
+        cirrus_clear_vram();
+    return 0;
 }
 
 
@@ -456,9 +456,7 @@ cirrus_check(void)
 static void
 clext_101280(struct bregs *regs)
 {
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x27, crtc_addr);
-    u8 v = inb(crtc_addr + 1);
+    u8 v = stdvga_crtc_read(stdvga_get_crtc(), 0x27);
     if (v == 0xa0)
         // 5430
         regs->ax = 0x0032;
@@ -481,16 +479,14 @@ clext_101281(struct bregs *regs)
 static void
 clext_101282(struct bregs *regs)
 {
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x27, crtc_addr);
-    regs->al = inb(crtc_addr + 1) & 0x03;
+    regs->al = stdvga_crtc_read(stdvga_get_crtc(), 0x27) & 0x03;
     regs->ah = 0xAF;
 }
 
 static void
 clext_101285(struct bregs *regs)
 {
-    regs->al = cirrus_get_memsize();
+    regs->al = GET_GLOBAL(VBE_total_memory) / (64*1024);
 }
 
 static void
@@ -511,7 +507,7 @@ ASM16(
 static void
 clext_1012a0(struct bregs *regs)
 {
-    struct cirrus_mode_s *table_g = cirrus_get_modeentry(regs->al & 0x7f);
+    struct vgamode_s *table_g = clext_find_mode(regs->al & 0x7f);
     regs->ah = (table_g ? 1 : 0);
     regs->si = 0xffff;
     regs->di = regs->ds = regs->es = regs->bx = (u32)a0h_callback;
@@ -560,207 +556,28 @@ clext_1012(struct bregs *regs)
 
 
 /****************************************************************
- * vesa calls
+ * init
  ****************************************************************/
 
-void
-clext_list_modes(u16 seg, u16 *dest, u16 *last)
+static int
+cirrus_check(void)
 {
-    int i;
-    for (i=0; i<ARRAY_SIZE(cirrus_vesa_modelist) && dest<last; i++) {
-        SET_FARVAR(seg, *dest, GET_GLOBAL(cirrus_vesa_modelist[i].vesamode));
-        dest++;
-    }
-    stdvga_list_modes(seg, dest, last);
+    stdvga_sequ_write(0x06, 0x92);
+    return stdvga_sequ_read(0x06) == 0x12;
 }
 
 static u8
-cirrus_get_bpp_bytes(void)
-{
-    outb(0x07, VGAREG_SEQU_ADDRESS);
-    u8 v = inb(VGAREG_SEQU_DATA) & 0x0e;
-    if (v == 0x06)
-        v &= 0x02;
-    v >>= 1;
-    if (v != 0x04)
-        v++;
-    return v;
-}
-
-static void
-cirrus_set_line_offset(u16 new_line_offset)
-{
-    new_line_offset /= 8;
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x13, crtc_addr);
-    outb(new_line_offset, crtc_addr + 1);
-
-    outb(0x1b, crtc_addr);
-    u8 v = inb(crtc_addr + 1);
-    outb(((new_line_offset & 0x100) >> 4) | (v & 0xef), crtc_addr + 1);
-}
-
-static u16
-cirrus_get_line_offset(void)
-{
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x13, crtc_addr);
-    u8 reg13 = inb(crtc_addr + 1);
-    outb(0x1b, crtc_addr);
-    u8 reg1b = inb(crtc_addr + 1);
-
-    return (((reg1b & 0x10) << 4) + reg13) * 8;
-}
-
-static void
-cirrus_set_start_addr(u32 addr)
-{
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x0d, crtc_addr);
-    outb(addr, crtc_addr + 1);
-
-    outb(0x0c, crtc_addr);
-    outb(addr>>8, crtc_addr + 1);
-
-    outb(0x1d, crtc_addr);
-    u8 v = inb(crtc_addr + 1);
-    outb(((addr & 0x0800) >> 4) | (v & 0x7f), crtc_addr + 1);
-
-    outb(0x1b, crtc_addr);
-    v = inb(crtc_addr + 1);
-    outb(((addr & 0x0100) >> 8) | ((addr & 0x0600) >> 7) | (v & 0xf2)
-         , crtc_addr + 1);
-}
-
-static u32
-cirrus_get_start_addr(void)
-{
-    u16 crtc_addr = stdvga_get_crtc();
-    outb(0x0c, crtc_addr);
-    u8 b2 = inb(crtc_addr + 1);
-
-    outb(0x0d, crtc_addr);
-    u8 b1 = inb(crtc_addr + 1);
-
-    outb(0x1b, crtc_addr);
-    u8 b3 = inb(crtc_addr + 1);
-
-    outb(0x1d, crtc_addr);
-    u8 b4 = inb(crtc_addr + 1);
-
-    return (b1 | (b2<<8) | ((b3 & 0x01) << 16) | ((b3 & 0x0c) << 15)
-            | ((b4 & 0x80) << 12));
-}
-
-static void
-cirrus_vesa_05h(struct bregs *regs)
-{
-    if (regs->bl > 1)
-        goto fail;
-    if (regs->bh == 0) {
-        // set mempage
-        if (regs->dx >= 0x100)
-            goto fail;
-        outw((regs->dx << 8) | (regs->bl + 9), VGAREG_GRDC_ADDRESS);
-    } else if (regs->bh == 1) {
-        // get mempage
-        outb(regs->bl + 9, VGAREG_GRDC_ADDRESS);
-        regs->dx = inb(VGAREG_GRDC_DATA);
-    } else
-        goto fail;
-
-    regs->ax = 0x004f;
-    return;
-fail:
-    regs->ax = 0x014f;
-}
-
-static void
-cirrus_vesa_06h(struct bregs *regs)
-{
-    if (regs->bl > 2) {
-        regs->ax = 0x0100;
-        return;
-    }
-
-    if (regs->bl == 0x00) {
-        cirrus_set_line_offset(cirrus_get_bpp_bytes() * regs->cx);
-    } else if (regs->bl == 0x02) {
-        cirrus_set_line_offset(regs->cx);
-    }
-
-    u32 v = cirrus_get_line_offset();
-    regs->cx = v / cirrus_get_bpp_bytes();
-    regs->bx = v;
-    regs->dx = (cirrus_get_memsize() * 64 * 1024) / v;
-    regs->ax = 0x004f;
-}
-
-static void
-cirrus_vesa_07h(struct bregs *regs)
-{
-    if (regs->bl == 0x80 || regs->bl == 0x00) {
-        u32 addr = (cirrus_get_bpp_bytes() * regs->cx
-                    + cirrus_get_line_offset() * regs->dx);
-        cirrus_set_start_addr(addr / 4);
-    } else if (regs->bl == 0x01) {
-        u32 addr = cirrus_get_start_addr() * 4;
-        u32 linelength = cirrus_get_line_offset();
-        regs->dx = addr / linelength;
-        regs->cx = (addr % linelength) / cirrus_get_bpp_bytes();
-    } else {
-        regs->ax = 0x0100;
-        return;
-    }
-
-    regs->ax = 0x004f;
-}
-
-static void
-cirrus_vesa_10h(struct bregs *regs)
-{
-    if (regs->bl == 0x00) {
-        regs->bx = 0x0f30;
-        regs->ax = 0x004f;
-        return;
-    }
-    if (regs->bl == 0x01) {
-        SET_BDA(vbe_flag, regs->bh);
-        regs->ax = 0x004f;
-        return;
-    }
-    if (regs->bl == 0x02) {
-        regs->bh = GET_BDA(vbe_flag);
-        regs->ax = 0x004f;
-        return;
-    }
-    regs->ax = 0x014f;
-}
-
-static void
-cirrus_vesa_not_handled(struct bregs *regs)
-{
-    debug_stub(regs);
-    regs->ax = 0x014f;
-}
-
-void
-cirrus_vesa(struct bregs *regs)
+cirrus_get_memsize(void)
 {
-    switch (regs->al) {
-    case 0x05: cirrus_vesa_05h(regs); break;
-    case 0x06: cirrus_vesa_06h(regs); break;
-    case 0x07: cirrus_vesa_07h(regs); break;
-    case 0x10: cirrus_vesa_10h(regs); break;
-    default:   cirrus_vesa_not_handled(regs); break;
-    }
+    // get DRAM band width
+    u8 v = stdvga_sequ_read(0x0f);
+    u8 x = (v >> 3) & 0x03;
+    if (x == 0x03 && v & 0x80)
+        // 4MB
+        return 0x40;
+    return 0x04 << x;
 }
 
-
-/****************************************************************
- * init
- ****************************************************************/
-
 int
 clext_init(void)
 {
@@ -773,25 +590,26 @@ clext_init(void)
         return -1;
     dprintf(1, "cirrus init 2\n");
 
-    SET_VGA(VBE_enabled, 1);
+    // memory setup
+    stdvga_sequ_write(0x0a, stdvga_sequ_read(0x0f) & 0x18);
+    // set vga mode
+    stdvga_sequ_write(0x07, 0x00);
+    // reset bitblt
+    stdvga_grdc_write(0x31, 0x04);
+    stdvga_grdc_write(0x31, 0x00);
+
+    if (GET_GLOBAL(HaveRunInit))
+        return 0;
+
     u32 lfb_addr = 0;
-    if (CONFIG_VGA_PCI)
-        lfb_addr = (pci_config_readl(GET_GLOBAL(VgaBDF), PCI_BASE_ADDRESS_0)
+    int bdf = GET_GLOBAL(VgaBDF);
+    if (CONFIG_VGA_PCI && bdf >= 0)
+        lfb_addr = (pci_config_readl(bdf, PCI_BASE_ADDRESS_0)
                     & PCI_BASE_ADDRESS_MEM_MASK);
     SET_VGA(VBE_framebuffer, lfb_addr);
     u16 totalmem = cirrus_get_memsize();
     SET_VGA(VBE_total_memory, totalmem * 64 * 1024);
     SET_VGA(VBE_win_granularity, 16);
 
-    // memory setup
-    outb(0x0f, VGAREG_SEQU_ADDRESS);
-    u8 v = inb(VGAREG_SEQU_DATA);
-    outb(((v & 0x18) << 8) | 0x0a, VGAREG_SEQU_ADDRESS);
-    // set vga mode
-    outw(0x0007, VGAREG_SEQU_ADDRESS);
-    // reset bitblt
-    outw(0x0431, VGAREG_GRDC_ADDRESS);
-    outw(0x0031, VGAREG_GRDC_ADDRESS);
-
     return 0;
 }