+// Bochs VGA interface to extended "VBE" modes
+//
+// Copyright (C) 2012 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2011 Julian Pidancet <julian.pidancet@citrix.com>
+// Copyright (C) 2002 Jeroen Janssen
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
#include "vgabios.h" // struct vbe_modeinfo
#include "vbe.h" // VBE_CAPABILITY_8BIT_DAC
#include "bochsvga.h" // bochsvga_set_mode
#include "pci.h" // pci_config_readl
#include "pci_regs.h" // PCI_BASE_ADDRESS_0
+
+/****************************************************************
+ * Mode tables
+ ****************************************************************/
+
static struct bochsvga_mode
{
u16 mode;
&& vmode_g <= &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)-1].info);
}
-static u16 dispi_get_max_xres(void)
+struct vgamode_s *bochsvga_find_mode(int mode)
{
- u16 en;
- u16 xres;
-
- en = dispi_read(VBE_DISPI_INDEX_ENABLE);
-
- dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
- xres = dispi_read(VBE_DISPI_INDEX_XRES);
- dispi_write(VBE_DISPI_INDEX_ENABLE, en);
-
- return xres;
+ struct bochsvga_mode *m = bochsvga_modes;
+ for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++)
+ if (GET_GLOBAL(m->mode) == mode)
+ return &m->info;
+ return stdvga_find_mode(mode);
}
-static u16 dispi_get_max_bpp(void)
+void
+bochsvga_list_modes(u16 seg, u16 *dest, u16 *last)
{
- u16 en;
- u16 bpp;
+ struct bochsvga_mode *m = bochsvga_modes;
+ for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)] && dest<last; m++) {
+ u16 mode = GET_GLOBAL(m->mode);
+ if (mode == 0xffff)
+ continue;
+ SET_FARVAR(seg, *dest, mode);
+ dest++;
+ }
+ stdvga_list_modes(seg, dest, last);
+}
- en = dispi_read(VBE_DISPI_INDEX_ENABLE);
- dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
- bpp = dispi_read(VBE_DISPI_INDEX_BPP);
- dispi_write(VBE_DISPI_INDEX_ENABLE, en);
+/****************************************************************
+ * Helper functions
+ ****************************************************************/
- return bpp;
+int
+bochsvga_get_window(struct vgamode_s *vmode_g, int window)
+{
+ if (window != 0)
+ return -1;
+ return dispi_read(VBE_DISPI_INDEX_BANK);
}
-/* Called only during POST */
int
-bochsvga_init(void)
+bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val)
{
- int ret = stdvga_init();
- if (ret)
- return ret;
-
- /* Sanity checks */
- dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID0);
- if (dispi_read(VBE_DISPI_INDEX_ID) != VBE_DISPI_ID0) {
- dprintf(1, "No VBE DISPI interface detected\n");
+ if (window != 0)
+ return -1;
+ dispi_write(VBE_DISPI_INDEX_BANK, val);
+ if (dispi_read(VBE_DISPI_INDEX_BANK) != val)
return -1;
- }
-
- dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID5);
-
- u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS;
- 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 = dispi_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K);
- SET_VGA(VBE_total_memory, totalmem * 64 * 1024);
- SET_VGA(VBE_capabilities, VBE_CAPABILITY_8BIT_DAC);
-
- dprintf(1, "VBE DISPI detected. lfb_addr=%x\n", lfb_addr);
-
return 0;
}
-static int mode_valid(struct vgamode_s *vmode_g)
+int
+bochsvga_get_linelength(struct vgamode_s *vmode_g)
{
- u16 max_xres = dispi_get_max_xres();
- u16 max_bpp = dispi_get_max_bpp();
- u32 max_mem = GET_GLOBAL(VBE_total_memory);
-
- u16 width = GET_GLOBAL(vmode_g->width);
- u16 height = GET_GLOBAL(vmode_g->height);
- u8 depth = GET_GLOBAL(vmode_g->depth);
- u32 mem = width * height * DIV_ROUND_UP(depth, 8);
-
- return width <= max_xres && depth <= max_bpp && mem <= max_mem;
+ return dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * vga_bpp(vmode_g) / 8;
}
-struct vgamode_s *bochsvga_find_mode(int mode)
+int
+bochsvga_set_linelength(struct vgamode_s *vmode_g, int val)
{
- struct bochsvga_mode *m = bochsvga_modes;
- for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++)
- if (GET_GLOBAL(m->mode) == mode) {
- if (! mode_valid(&m->info))
- return NULL;
- return &m->info;
- }
- return stdvga_find_mode(mode);
+ stdvga_set_linelength(vmode_g, val);
+ int pixels = (val * 8) / vga_bpp(vmode_g);
+ dispi_write(VBE_DISPI_INDEX_VIRT_WIDTH, pixels);
+ return 0;
}
-void
-bochsvga_list_modes(u16 seg, u16 *dest, u16 *last)
+int
+bochsvga_get_displaystart(struct vgamode_s *vmode_g)
{
- struct bochsvga_mode *m = bochsvga_modes;
- for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)] && dest<last; m++) {
- if (!mode_valid(&m->info))
- continue;
-
- dprintf(1, "VBE found mode %x valid.\n", GET_GLOBAL(m->mode));
- SET_FARVAR(seg, *dest, GET_GLOBAL(m->mode));
- dest++;
- }
-
- stdvga_list_modes(seg, dest, last);
+ int bpp = vga_bpp(vmode_g);
+ int linelength = dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * bpp / 8;
+ int x = dispi_read(VBE_DISPI_INDEX_X_OFFSET);
+ int y = dispi_read(VBE_DISPI_INDEX_Y_OFFSET);
+ return x * bpp / 8 + linelength * y;
}
-static void
-bochsvga_hires_enable(int enable)
+int
+bochsvga_set_displaystart(struct vgamode_s *vmode_g, int val)
{
- u16 flags = enable ?
- VBE_DISPI_ENABLED |
- VBE_DISPI_LFB_ENABLED |
- VBE_DISPI_NOCLEARMEM : 0;
-
- dispi_write(VBE_DISPI_INDEX_ENABLE, flags);
+ stdvga_set_displaystart(vmode_g, val);
+ int bpp = vga_bpp(vmode_g);
+ int linelength = dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * bpp / 8;
+ dispi_write(VBE_DISPI_INDEX_X_OFFSET, (val % linelength) * 8 / bpp);
+ dispi_write(VBE_DISPI_INDEX_Y_OFFSET, val / linelength);
+ return 0;
}
-static void
-bochsvga_clear_scr(void)
-{
- u16 en;
- en = dispi_read(VBE_DISPI_INDEX_ENABLE);
- en &= ~VBE_DISPI_NOCLEARMEM;
- dispi_write(VBE_DISPI_INDEX_ENABLE, en);
-}
+/****************************************************************
+ * Mode setting
+ ****************************************************************/
int
bochsvga_set_mode(struct vgamode_s *vmode_g, int flags)
{
- if (! is_bochsvga_mode(vmode_g)) {
- bochsvga_hires_enable(0);
+ dispi_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
+ if (! is_bochsvga_mode(vmode_g))
return stdvga_set_mode(vmode_g, flags);
- }
-
- bochsvga_hires_enable(1);
u8 depth = GET_GLOBAL(vmode_g->depth);
if (depth == 4)
dispi_write(VBE_DISPI_INDEX_XRES, width);
dispi_write(VBE_DISPI_INDEX_YRES, height);
dispi_write(VBE_DISPI_INDEX_BANK, 0);
+ u16 bf = ((flags & MF_NOCLEARMEM ? VBE_DISPI_NOCLEARMEM : 0)
+ | (flags & MF_LINEARFB ? VBE_DISPI_LFB_ENABLED : 0));
+ dispi_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | bf);
/* VGA compat setup */
- //XXX: This probably needs some reverse engineering
u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
stdvga_crtc_write(crtc_addr, 0x11, 0x00);
stdvga_crtc_write(crtc_addr, 0x01, width / 8 - 1);
- dispi_write(VBE_DISPI_INDEX_VIRT_WIDTH, width);
+ stdvga_set_linelength(vmode_g, width);
stdvga_crtc_write(crtc_addr, 0x12, height - 1);
u8 v = 0;
if ((height - 1) & 0x0100)
stdvga_grdc_mask(0x05, 0x20, 0x40);
}
- if (flags & MF_LINEARFB) {
- /* Linear frame buffer */
- /* XXX: ??? */
+ return 0;
+}
+
+
+/****************************************************************
+ * Init
+ ****************************************************************/
+
+int
+bochsvga_init(void)
+{
+ int ret = stdvga_init();
+ if (ret)
+ return ret;
+
+ /* Sanity checks */
+ dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID0);
+ if (dispi_read(VBE_DISPI_INDEX_ID) != VBE_DISPI_ID0) {
+ dprintf(1, "No VBE DISPI interface detected\n");
+ return -1;
+ }
+
+ dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID5);
+
+ if (GET_GLOBAL(HaveRunInit))
+ return 0;
+
+ u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS;
+ int bdf = GET_GLOBAL(VgaBDF);
+ if (CONFIG_VGA_PCI && bdf >= 0) {
+ int barid = 0;
+ u32 bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_0);
+ if ((bar & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
+ barid = 1;
+ bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_1);
+ }
+ lfb_addr = bar & PCI_BASE_ADDRESS_MEM_MASK;
+ dprintf(1, "VBE DISPI: bdf %02x:%02x.%x, bar %d\n", pci_bdf_to_bus(bdf)
+ , pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf), barid);
}
- if (!(flags & MF_NOCLEARMEM)) {
- bochsvga_clear_scr();
+
+ SET_VGA(VBE_framebuffer, lfb_addr);
+ u32 totalmem = dispi_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024;
+ SET_VGA(VBE_total_memory, totalmem);
+ SET_VGA(VBE_capabilities, VBE_CAPABILITY_8BIT_DAC);
+
+ dprintf(1, "VBE DISPI: lfb_addr=%x, size %d MB\n",
+ lfb_addr, totalmem / 16);
+
+ // Validate modes
+ u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE);
+ dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
+ u16 max_xres = dispi_read(VBE_DISPI_INDEX_XRES);
+ u16 max_bpp = dispi_read(VBE_DISPI_INDEX_BPP);
+ dispi_write(VBE_DISPI_INDEX_ENABLE, en);
+ struct bochsvga_mode *m = bochsvga_modes;
+ for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++) {
+ u16 width = GET_GLOBAL(m->info.width);
+ u16 height = GET_GLOBAL(m->info.height);
+ u8 depth = GET_GLOBAL(m->info.depth);
+ u32 mem = (height * DIV_ROUND_UP(width * vga_bpp(&m->info), 8)
+ * 4 / stdvga_bpp_factor(&m->info));
+
+ if (width > max_xres || depth > max_bpp || mem > totalmem) {
+ dprintf(1, "Removing mode %x\n", GET_GLOBAL(m->mode));
+ SET_VGA(m->mode, 0xffff);
+ }
}
return 0;
projects / seabios.git / blobdiff