summaryrefslogtreecommitdiff
path: root/util/x86emu/yabel/vbe.c
diff options
context:
space:
mode:
Diffstat (limited to 'util/x86emu/yabel/vbe.c')
-rw-r--r--util/x86emu/yabel/vbe.c779
1 files changed, 779 insertions, 0 deletions
diff --git a/util/x86emu/yabel/vbe.c b/util/x86emu/yabel/vbe.c
new file mode 100644
index 0000000000..a2c9f82655
--- /dev/null
+++ b/util/x86emu/yabel/vbe.c
@@ -0,0 +1,779 @@
+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * Copyright (c) 2009 Pattrick Hueper <phueper@hueper.net>
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#include <string.h>
+#include <types.h>
+#ifndef CONFIG_COREBOOT_V2
+#include <cpu.h>
+#endif
+
+#include "debug.h"
+
+#include <x86emu/x86emu.h>
+#include <x86emu/regs.h>
+#ifdef CONFIG_COREBOOT_V2
+#include "../x86emu/prim_ops.h"
+#else
+#include <x86emu/prim_ops.h> // for push_word
+#endif
+
+#include "biosemu.h"
+#include "io.h"
+#include "mem.h"
+#include "interrupt.h"
+#include "device.h"
+
+static X86EMU_memFuncs my_mem_funcs = {
+ my_rdb, my_rdw, my_rdl,
+ my_wrb, my_wrw, my_wrl
+};
+
+static X86EMU_pioFuncs my_pio_funcs = {
+ my_inb, my_inw, my_inl,
+ my_outb, my_outw, my_outl
+};
+
+// pointer to VBEInfoBuffer, set by vbe_prepare
+u8 *vbe_info_buffer = 0;
+// virtual BIOS Memory
+u8 *biosmem;
+u32 biosmem_size;
+
+// these structs are for input from and output to OF
+typedef struct {
+ u8 display_type; // 0=NONE, 1= analog, 2=digital
+ u16 screen_width;
+ u16 screen_height;
+ u16 screen_linebytes; // bytes per line in framebuffer, may be more than screen_width
+ u8 color_depth; // color depth in bpp
+ u32 framebuffer_address;
+ u8 edid_block_zero[128];
+} __attribute__ ((__packed__)) screen_info_t;
+
+typedef struct {
+ u8 signature[4];
+ u16 size_reserved;
+ u8 monitor_number;
+ u16 max_screen_width;
+ u8 color_depth;
+} __attribute__ ((__packed__)) screen_info_input_t;
+
+// these structs only store a subset of the VBE defined fields
+// only those needed.
+typedef struct {
+ char signature[4];
+ u16 version;
+ u8 *oem_string_ptr;
+ u32 capabilities;
+ u16 video_mode_list[256]; // lets hope we never have more than 256 video modes...
+ u16 total_memory;
+} vbe_info_t;
+
+typedef struct {
+ u16 video_mode;
+ u8 mode_info_block[256];
+ u16 attributes;
+ u16 linebytes;
+ u16 x_resolution;
+ u16 y_resolution;
+ u8 x_charsize;
+ u8 y_charsize;
+ u8 bits_per_pixel;
+ u8 memory_model;
+ u32 framebuffer_address;
+} vbe_mode_info_t;
+
+typedef struct {
+ u8 port_number; // i.e. monitor number
+ u8 edid_transfer_time;
+ u8 ddc_level;
+ u8 edid_block_zero[128];
+} vbe_ddc_info_t;
+
+static inline u8
+vbe_prepare()
+{
+ vbe_info_buffer = biosmem + (VBE_SEGMENT << 4); // segment:offset off VBE Data Area
+ //clear buffer
+ memset(vbe_info_buffer, 0, 512);
+ //set VbeSignature to "VBE2" to indicate VBE 2.0+ request
+ vbe_info_buffer[0] = 'V';
+ vbe_info_buffer[0] = 'B';
+ vbe_info_buffer[0] = 'E';
+ vbe_info_buffer[0] = '2';
+ // ES:DI store pointer to buffer in virtual mem see vbe_info_buffer above...
+ M.x86.R_EDI = 0x0;
+ M.x86.R_ES = VBE_SEGMENT;
+
+ return 0; // successfull init
+}
+
+// VBE Function 00h
+u8
+vbe_info(vbe_info_t * info)
+{
+ vbe_prepare();
+ // call VBE function 00h (Info Function)
+ M.x86.R_EAX = 0x4f00;
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE("%s: VBE Info Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Info Function Return Code NOT OK! AH=%x\n",
+ __func__, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ //printf("VBE Info Dump:");
+ //dump(vbe_info_buffer, 64);
+
+ //offset 0: signature
+ info->signature[0] = vbe_info_buffer[0];
+ info->signature[1] = vbe_info_buffer[1];
+ info->signature[2] = vbe_info_buffer[2];
+ info->signature[3] = vbe_info_buffer[3];
+
+ // offset 4: 16bit le containing VbeVersion
+ info->version = in16le(vbe_info_buffer + 4);
+
+ // offset 6: 32bit le containg segment:offset of OEM String in virtual Mem.
+ info->oem_string_ptr =
+ biosmem + ((in16le(vbe_info_buffer + 8) << 4) +
+ in16le(vbe_info_buffer + 6));
+
+ // offset 10: 32bit le capabilities
+ info->capabilities = in32le(vbe_info_buffer + 10);
+
+ // offset 14: 32 bit le containing segment:offset of supported video mode table
+ u16 *video_mode_ptr;
+ video_mode_ptr =
+ (u16 *) (biosmem +
+ ((in16le(vbe_info_buffer + 16) << 4) +
+ in16le(vbe_info_buffer + 14)));
+ u32 i = 0;
+ do {
+ info->video_mode_list[i] = in16le(video_mode_ptr + i);
+ i++;
+ }
+ while ((i <
+ (sizeof(info->video_mode_list) /
+ sizeof(info->video_mode_list[0])))
+ && (info->video_mode_list[i - 1] != 0xFFFF));
+
+ //offset 18: 16bit le total memory in 64KB blocks
+ info->total_memory = in16le(vbe_info_buffer + 18);
+
+ return 0;
+}
+
+// VBE Function 01h
+u8
+vbe_get_mode_info(vbe_mode_info_t * mode_info)
+{
+ vbe_prepare();
+ // call VBE function 01h (Return VBE Mode Info Function)
+ M.x86.R_EAX = 0x4f01;
+ M.x86.R_CX = mode_info->video_mode;
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Return Mode Info Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Return Mode Info (mode: %04x) Function Return Code NOT OK! AH=%02x\n",
+ __func__, mode_info->video_mode, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ //pointer to mode_info_block is in ES:DI
+ memcpy(mode_info->mode_info_block,
+ biosmem + ((M.x86.R_ES << 4) + M.x86.R_DI),
+ sizeof(mode_info->mode_info_block));
+
+ //printf("Mode Info Dump:");
+ //dump(mode_info_block, 64);
+
+ // offset 0: 16bit le mode attributes
+ mode_info->attributes = in16le(mode_info->mode_info_block);
+
+ // offset 16: 16bit le bytes per scan line
+ mode_info->linebytes = in16le(mode_info->mode_info_block + 16);
+
+ // offset 18: 16bit le x resolution
+ mode_info->x_resolution = in16le(mode_info->mode_info_block + 18);
+
+ // offset 20: 16bit le y resolution
+ mode_info->y_resolution = in16le(mode_info->mode_info_block + 20);
+
+ // offset 22: 8bit le x charsize
+ mode_info->x_charsize = *(mode_info->mode_info_block + 22);
+
+ // offset 23: 8bit le y charsize
+ mode_info->y_charsize = *(mode_info->mode_info_block + 23);
+
+ // offset 25: 8bit le bits per pixel
+ mode_info->bits_per_pixel = *(mode_info->mode_info_block + 25);
+
+ // offset 27: 8bit le memory model
+ mode_info->memory_model = *(mode_info->mode_info_block + 27);
+
+ // offset 40: 32bit le containg offset of frame buffer memory ptr
+ mode_info->framebuffer_address =
+ in32le(mode_info->mode_info_block + 40);
+
+ return 0;
+}
+
+// VBE Function 02h
+u8
+vbe_set_mode(vbe_mode_info_t * mode_info)
+{
+ vbe_prepare();
+ // call VBE function 02h (Set VBE Mode Function)
+ M.x86.R_EAX = 0x4f02;
+ M.x86.R_BX = mode_info->video_mode;
+ M.x86.R_BX |= 0x4000; // set bit 14 to request linear framebuffer mode
+ M.x86.R_BX &= 0x7FFF; // clear bit 15 to request clearing of framebuffer
+
+ DEBUG_PRINTF_VBE("%s: setting mode: 0x%04x\n", __func__,
+ M.x86.R_BX);
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Mode Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: mode: %x VBE Set Mode Function Return Code NOT OK! AH=%x\n",
+ __func__, mode_info->video_mode, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ return 0;
+}
+
+//VBE Function 08h
+u8
+vbe_set_palette_format(u8 format)
+{
+ vbe_prepare();
+ // call VBE function 09h (Set/Get Palette Data Function)
+ M.x86.R_EAX = 0x4f08;
+ M.x86.R_BL = 0x00; // set format
+ M.x86.R_BH = format;
+
+ DEBUG_PRINTF_VBE("%s: setting palette format: %d\n", __func__,
+ format);
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Format Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Format Function Return Code NOT OK! AH=%x\n",
+ __func__, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ return 0;
+}
+
+// VBE Function 09h
+u8
+vbe_set_color(u16 color_number, u32 color_value)
+{
+ vbe_prepare();
+ // call VBE function 09h (Set/Get Palette Data Function)
+ M.x86.R_EAX = 0x4f09;
+ M.x86.R_BL = 0x00; // set color
+ M.x86.R_CX = 0x01; // set only one entry
+ M.x86.R_DX = color_number;
+ // ES:DI is address where color_value is stored, we store it at 2000:0000
+ M.x86.R_ES = 0x2000;
+ M.x86.R_DI = 0x0;
+
+ // store color value at ES:DI
+ out32le(biosmem + (M.x86.R_ES << 4) + M.x86.R_DI, color_value);
+
+ DEBUG_PRINTF_VBE("%s: setting color #%x: 0x%04x\n", __func__,
+ color_number, color_value);
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Function Return Code NOT OK! AH=%x\n",
+ __func__, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ return 0;
+}
+
+u8
+vbe_get_color(u16 color_number, u32 * color_value)
+{
+ vbe_prepare();
+ // call VBE function 09h (Set/Get Palette Data Function)
+ M.x86.R_EAX = 0x4f09;
+ M.x86.R_BL = 0x00; // get color
+ M.x86.R_CX = 0x01; // get only one entry
+ M.x86.R_DX = color_number;
+ // ES:DI is address where color_value is stored, we store it at 2000:0000
+ M.x86.R_ES = 0x2000;
+ M.x86.R_DI = 0x0;
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Set Palette Function Return Code NOT OK! AH=%x\n",
+ __func__, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ // read color value from ES:DI
+ *color_value = in32le(biosmem + (M.x86.R_ES << 4) + M.x86.R_DI);
+
+ DEBUG_PRINTF_VBE("%s: getting color #%x --> 0x%04x\n", __func__,
+ color_number, *color_value);
+
+ return 0;
+}
+
+// VBE Function 15h
+u8
+vbe_get_ddc_info(vbe_ddc_info_t * ddc_info)
+{
+ vbe_prepare();
+ // call VBE function 15h (DDC Info Function)
+ M.x86.R_EAX = 0x4f15;
+ M.x86.R_BL = 0x00; // get DDC Info
+ M.x86.R_CX = ddc_info->port_number;
+ M.x86.R_ES = 0x0;
+ M.x86.R_DI = 0x0;
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Get DDC Info Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: port: %x VBE Get DDC Info Function Return Code NOT OK! AH=%x\n",
+ __func__, ddc_info->port_number, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+ // BH = approx. time in seconds to transfer one EDID block
+ ddc_info->edid_transfer_time = M.x86.R_BH;
+ // BL = DDC Level
+ ddc_info->ddc_level = M.x86.R_BL;
+
+ vbe_prepare();
+ // call VBE function 15h (DDC Info Function)
+ M.x86.R_EAX = 0x4f15;
+ M.x86.R_BL = 0x01; // read EDID
+ M.x86.R_CX = ddc_info->port_number;
+ M.x86.R_DX = 0x0; // block number
+ // ES:DI is address where EDID is stored, we store it at 2000:0000
+ M.x86.R_ES = 0x2000;
+ M.x86.R_DI = 0x0;
+
+ // enable trace
+ CHECK_DBG(DEBUG_TRACE_X86EMU) {
+ X86EMU_trace_on();
+ }
+ // run VESA Interrupt
+ runInt10();
+
+ if (M.x86.R_AL != 0x4f) {
+ DEBUG_PRINTF_VBE
+ ("%s: VBE Read EDID Function NOT supported! AL=%x\n",
+ __func__, M.x86.R_AL);
+ return -1;
+ }
+
+ if (M.x86.R_AH != 0x0) {
+ DEBUG_PRINTF_VBE
+ ("%s: port: %x VBE Read EDID Function Return Code NOT OK! AH=%x\n",
+ __func__, ddc_info->port_number, M.x86.R_AH);
+ return M.x86.R_AH;
+ }
+
+ memcpy(ddc_info->edid_block_zero,
+ biosmem + (M.x86.R_ES << 4) + M.x86.R_DI,
+ sizeof(ddc_info->edid_block_zero));
+
+ return 0;
+}
+
+u32
+vbe_get_info(u8 argc, char ** argv)
+{
+ u8 rval;
+ u32 i;
+ if (argc < 4) {
+ printf
+ ("Usage %s <vmem_base> <device_path> <address of screen_info_t>\n",
+ argv[0]);
+ int i = 0;
+ for (i = 0; i < argc; i++) {
+ printf("argv[%d]: %s\n", i, argv[i]);
+ }
+ return -1;
+ }
+ // get a copy of input struct...
+ screen_info_input_t input =
+ *((screen_info_input_t *) strtoul((char *) argv[4], 0, 16));
+ // output is pointer to the address passed as argv[4]
+ screen_info_t *output =
+ (screen_info_t *) strtoul((char *) argv[4], 0, 16);
+ // zero output
+ memset(output, 0, sizeof(screen_info_t));
+
+ // argv[1] is address of virtual BIOS mem...
+ // argv[2] is the size
+ biosmem = (u8 *) strtoul(argv[1], 0, 16);
+ biosmem_size = strtoul(argv[2], 0, 16);;
+ if (biosmem_size < MIN_REQUIRED_VMEM_SIZE) {
+ printf("Error: Not enough virtual memory: %x, required: %x!\n",
+ biosmem_size, MIN_REQUIRED_VMEM_SIZE);
+ return -1;
+ }
+ // argv[3] is the device to open and use...
+ if (dev_init((char *) argv[3]) != 0) {
+ printf("Error initializing device!\n");
+ return -1;
+ }
+ //setup interrupt handler
+ X86EMU_intrFuncs intrFuncs[256];
+ for (i = 0; i < 256; i++)
+ intrFuncs[i] = handleInterrupt;
+ X86EMU_setupIntrFuncs(intrFuncs);
+ X86EMU_setupPioFuncs(&my_pio_funcs);
+ X86EMU_setupMemFuncs(&my_mem_funcs);
+
+ // set mem_base
+ M.mem_base = (long) biosmem;
+ M.mem_size = biosmem_size;
+ DEBUG_PRINTF_VBE("membase set: %08x, size: %08x\n", (int) M.mem_base,
+ (int) M.mem_size);
+
+ vbe_info_t info;
+ rval = vbe_info(&info);
+ if (rval != 0)
+ return rval;
+
+ DEBUG_PRINTF_VBE("VbeSignature: %s\n", info.signature);
+ DEBUG_PRINTF_VBE("VbeVersion: 0x%04x\n", info.version);
+ DEBUG_PRINTF_VBE("OemString: %s\n", info.oem_string_ptr);
+ DEBUG_PRINTF_VBE("Capabilities:\n");
+ DEBUG_PRINTF_VBE("\tDAC: %s\n",
+ (info.capabilities & 0x1) ==
+ 0 ? "fixed 6bit" : "switchable 6/8bit");
+ DEBUG_PRINTF_VBE("\tVGA: %s\n",
+ (info.capabilities & 0x2) ==
+ 0 ? "compatible" : "not compatible");
+ DEBUG_PRINTF_VBE("\tRAMDAC: %s\n",
+ (info.capabilities & 0x4) ==
+ 0 ? "normal" : "use blank bit in Function 09h");
+
+ // argv[4] may be a pointer with enough space to return screen_info_t
+ // as input, it must contain a screen_info_input_t with the following content:
+ // byte[0:3] = "DDC\0" (zero-terminated signature header)
+ // byte[4:5] = reserved space for the return struct... just in case we ever change
+ // the struct and dont have reserved enough memory (and let's hope the struct
+ // never gets larger than 64KB)
+ // byte[6] = monitor port number for DDC requests ("only" one byte... so lets hope we never have more than 255 monitors...
+ // byte[7:8] = max. screen width (OF may want to limit this)
+ // byte[9] = required color depth in bpp
+ if (strncmp((char *) input.signature, "DDC", 4) != 0) {
+ printf
+ ("%s: Invalid input signature! expected: %s, is: %s\n",
+ __func__, "DDC", input.signature);
+ return -1;
+ }
+ if (input.size_reserved != sizeof(screen_info_t)) {
+ printf
+ ("%s: Size of return struct is wrong, required: %d, available: %d\n",
+ __func__, (int) sizeof(screen_info_t),
+ input.size_reserved);
+ return -1;
+ }
+
+ vbe_ddc_info_t ddc_info;
+ ddc_info.port_number = input.monitor_number;
+ vbe_get_ddc_info(&ddc_info);
+
+#if 0
+ DEBUG_PRINTF_VBE("DDC: edid_tranfer_time: %d\n",
+ ddc_info.edid_transfer_time);
+ DEBUG_PRINTF_VBE("DDC: ddc_level: %x\n", ddc_info.ddc_level);
+ DEBUG_PRINTF_VBE("DDC: EDID: \n");
+ CHECK_DBG(DEBUG_VBE) {
+ dump(ddc_info.edid_block_zero,
+ sizeof(ddc_info.edid_block_zero));
+ }
+#endif
+ if (*((u64 *) ddc_info.edid_block_zero) !=
+ (u64) 0x00FFFFFFFFFFFF00) {
+ // invalid EDID signature... probably no monitor
+
+ output->display_type = 0x0;
+ return 0;
+ } else if ((ddc_info.edid_block_zero[20] & 0x80) != 0) {
+ // digital display
+ output->display_type = 2;
+ } else {
+ // analog
+ output->display_type = 1;
+ }
+ DEBUG_PRINTF_VBE("DDC: found display type %d\n", output->display_type);
+ memcpy(output->edid_block_zero, ddc_info.edid_block_zero,
+ sizeof(ddc_info.edid_block_zero));
+ i = 0;
+ vbe_mode_info_t mode_info;
+ vbe_mode_info_t best_mode_info;
+ // initialize best_mode to 0
+ memset(&best_mode_info, 0, sizeof(best_mode_info));
+ while ((mode_info.video_mode = info.video_mode_list[i]) != 0xFFFF) {
+ //DEBUG_PRINTF_VBE("%x: Mode: %04x\n", i, mode_info.video_mode);
+ vbe_get_mode_info(&mode_info);
+#if 0
+ DEBUG_PRINTF_VBE("Video Mode 0x%04x available, %s\n",
+ mode_info.video_mode,
+ (mode_info.attributes & 0x1) ==
+ 0 ? "not supported" : "supported");
+ DEBUG_PRINTF_VBE("\tTTY: %s\n",
+ (mode_info.attributes & 0x4) ==
+ 0 ? "no" : "yes");
+ DEBUG_PRINTF_VBE("\tMode: %s %s\n",
+ (mode_info.attributes & 0x8) ==
+ 0 ? "monochrome" : "color",
+ (mode_info.attributes & 0x10) ==
+ 0 ? "text" : "graphics");
+ DEBUG_PRINTF_VBE("\tVGA: %s\n",
+ (mode_info.attributes & 0x20) ==
+ 0 ? "compatible" : "not compatible");
+ DEBUG_PRINTF_VBE("\tWindowed Mode: %s\n",
+ (mode_info.attributes & 0x40) ==
+ 0 ? "yes" : "no");
+ DEBUG_PRINTF_VBE("\tFramebuffer: %s\n",
+ (mode_info.attributes & 0x80) ==
+ 0 ? "no" : "yes");
+ DEBUG_PRINTF_VBE("\tResolution: %dx%d\n",
+ mode_info.x_resolution,
+ mode_info.y_resolution);
+ DEBUG_PRINTF_VBE("\tChar Size: %dx%d\n",
+ mode_info.x_charsize, mode_info.y_charsize);
+ DEBUG_PRINTF_VBE("\tColor Depth: %dbpp\n",
+ mode_info.bits_per_pixel);
+ DEBUG_PRINTF_VBE("\tMemory Model: 0x%x\n",
+ mode_info.memory_model);
+ DEBUG_PRINTF_VBE("\tFramebuffer Offset: %08x\n",
+ mode_info.framebuffer_address);
+#endif
+ if ((mode_info.bits_per_pixel == input.color_depth)
+ && (mode_info.x_resolution <= input.max_screen_width)
+ && ((mode_info.attributes & 0x80) != 0) // framebuffer mode
+ && ((mode_info.attributes & 0x10) != 0) // graphics
+ && ((mode_info.attributes & 0x8) != 0) // color
+ && (mode_info.x_resolution > best_mode_info.x_resolution)) // better than previous best_mode
+ {
+ // yiiiihaah... we found a new best mode
+ memcpy(&best_mode_info, &mode_info, sizeof(mode_info));
+ }
+ i++;
+ }
+
+ if (best_mode_info.video_mode != 0) {
+ DEBUG_PRINTF_VBE
+ ("Best Video Mode found: 0x%x, %dx%d, %dbpp, framebuffer_address: 0x%x\n",
+ best_mode_info.video_mode,
+ best_mode_info.x_resolution,
+ best_mode_info.y_resolution,
+ best_mode_info.bits_per_pixel,
+ best_mode_info.framebuffer_address);
+
+ //printf("Mode Info Dump:");
+ //dump(best_mode_info.mode_info_block, 64);
+
+ // set the video mode
+ vbe_set_mode(&best_mode_info);
+
+ if ((info.capabilities & 0x1) != 0) {
+ // switch to 8 bit palette format
+ vbe_set_palette_format(8);
+ }
+ // setup a palette:
+ // - first 216 colors are mixed colors for each component in 6 steps
+ // (6*6*6=216)
+ // - then 10 shades of the three primary colors
+ // - then 10 shades of grey
+ // -------
+ // = 256 colors
+ //
+ // - finally black is color 0 and white color FF (because SLOF expects it
+ // this way...)
+ // this resembles the palette that the kernel/X Server seems to expect...
+
+ u8 mixed_color_values[6] =
+ { 0xFF, 0xDA, 0xB3, 0x87, 0x54, 0x00 };
+ u8 primary_color_values[10] =
+ { 0xF3, 0xE7, 0xCD, 0xC0, 0xA5, 0x96, 0x77, 0x66, 0x3F,
+ 0x27
+ };
+ u8 mc_size = sizeof(mixed_color_values);
+ u8 prim_size = sizeof(primary_color_values);
+
+ u8 curr_color_index;
+ u32 curr_color;
+
+ u8 r, g, b;
+ // 216 mixed colors
+ for (r = 0; r < mc_size; r++) {
+ for (g = 0; g < mc_size; g++) {
+ for (b = 0; b < mc_size; b++) {
+ curr_color_index =
+ (r * mc_size * mc_size) +
+ (g * mc_size) + b;
+ curr_color = 0;
+ curr_color |= ((u32) mixed_color_values[r]) << 16; //red value
+ curr_color |= ((u32) mixed_color_values[g]) << 8; //green value
+ curr_color |= (u32) mixed_color_values[b]; //blue value
+ vbe_set_color(curr_color_index,
+ curr_color);
+ }
+ }
+ }
+
+ // 10 shades of each primary color
+ // red
+ for (r = 0; r < prim_size; r++) {
+ curr_color_index = mc_size * mc_size * mc_size + r;
+ curr_color = ((u32) primary_color_values[r]) << 16;
+ vbe_set_color(curr_color_index, curr_color);
+ }
+ //green
+ for (g = 0; g < prim_size; g++) {
+ curr_color_index =
+ mc_size * mc_size * mc_size + prim_size + g;
+ curr_color = ((u32) primary_color_values[g]) << 8;
+ vbe_set_color(curr_color_index, curr_color);
+ }
+ //blue
+ for (b = 0; b < prim_size; b++) {
+ curr_color_index =
+ mc_size * mc_size * mc_size + prim_size * 2 + b;
+ curr_color = (u32) primary_color_values[b];
+ vbe_set_color(curr_color_index, curr_color);
+ }
+ // 10 shades of grey
+ for (i = 0; i < prim_size; i++) {
+ curr_color_index =
+ mc_size * mc_size * mc_size + prim_size * 3 + i;
+ curr_color = 0;
+ curr_color |= ((u32) primary_color_values[i]) << 16; //red
+ curr_color |= ((u32) primary_color_values[i]) << 8; //green
+ curr_color |= ((u32) primary_color_values[i]); //blue
+ vbe_set_color(curr_color_index, curr_color);
+ }
+
+ // SLOF is using color 0x0 (black) and 0xFF (white) to draw to the screen...
+ vbe_set_color(0x00, 0x00000000);
+ vbe_set_color(0xFF, 0x00FFFFFF);
+
+ output->screen_width = best_mode_info.x_resolution;
+ output->screen_height = best_mode_info.y_resolution;
+ output->screen_linebytes = best_mode_info.linebytes;
+ output->color_depth = best_mode_info.bits_per_pixel;
+ output->framebuffer_address =
+ best_mode_info.framebuffer_address;
+ } else {
+ printf("%s: No suitable video mode found!\n", __func__);
+ //unset display_type...
+ output->display_type = 0;
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-13 08:39:22 +0000