diff options
Diffstat (limited to 'roms/seabios/vgasrc/bochsvga.c')
| -rw-r--r-- | roms/seabios/vgasrc/bochsvga.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/roms/seabios/vgasrc/bochsvga.c b/roms/seabios/vgasrc/bochsvga.c new file mode 100644 index 000000000..fd5e586b0 --- /dev/null +++ b/roms/seabios/vgasrc/bochsvga.c @@ -0,0 +1,390 @@ +// 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 "biosvar.h" // GET_GLOBAL +#include "bochsvga.h" // bochsvga_set_mode +#include "config.h" // CONFIG_* +#include "hw/pci.h" // pci_config_readl +#include "hw/pci_regs.h" // PCI_BASE_ADDRESS_0 +#include "output.h" // dprintf +#include "std/vbe.h" // VBE_CAPABILITY_8BIT_DAC +#include "stdvga.h" // stdvga_get_linelength +#include "vgabios.h" // SET_VGA +#include "vgautil.h" // VBE_total_memory +#include "x86.h" // outw + + +/**************************************************************** + * Mode tables + ****************************************************************/ + +#include "svgamodes.h" + +static int dispi_found VAR16 = 0; + +static int is_bochsvga_mode(struct vgamode_s *vmode_g) +{ + unsigned int mcount = GET_GLOBAL(svga_mcount); + + return (vmode_g >= &svga_modes[0].info + && vmode_g <= &svga_modes[mcount-1].info); +} + +struct vgamode_s *bochsvga_find_mode(int mode) +{ + struct generic_svga_mode *m = svga_modes; + unsigned int mcount = GET_GLOBAL(svga_mcount); + + if (GET_GLOBAL(dispi_found)) + for (; m < &svga_modes[mcount]; m++) + if (GET_GLOBAL(m->mode) == mode) + return &m->info; + return stdvga_find_mode(mode); +} + +void +bochsvga_list_modes(u16 seg, u16 *dest, u16 *last) +{ + struct generic_svga_mode *m = svga_modes; + unsigned int mcount = GET_GLOBAL(svga_mcount); + + if (GET_GLOBAL(dispi_found)) { + for (; m < &svga_modes[mcount] && 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); +} + + +/**************************************************************** + * Helper functions + ****************************************************************/ + +static inline u16 dispi_read(u16 reg) +{ + outw(reg, VBE_DISPI_IOPORT_INDEX); + return inw(VBE_DISPI_IOPORT_DATA); +} +static inline void dispi_write(u16 reg, u16 val) +{ + outw(reg, VBE_DISPI_IOPORT_INDEX); + outw(val, VBE_DISPI_IOPORT_DATA); +} + +static u8 +bochsvga_dispi_enabled(void) +{ + if (!GET_GLOBAL(dispi_found)) + return 0; + u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE); + if (!(en & VBE_DISPI_ENABLED)) + return 0; + return 1; +} + +int +bochsvga_get_window(struct vgamode_s *vmode_g, int window) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_get_window(vmode_g, window); + if (window != 0) + return -1; + return dispi_read(VBE_DISPI_INDEX_BANK); +} + +int +bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_set_window(vmode_g, window, val); + if (window != 0) + return -1; + dispi_write(VBE_DISPI_INDEX_BANK, val); + if (dispi_read(VBE_DISPI_INDEX_BANK) != val) + return -1; + return 0; +} + +int +bochsvga_get_linelength(struct vgamode_s *vmode_g) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_get_linelength(vmode_g); + return dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * vga_bpp(vmode_g) / 8; +} + +int +bochsvga_set_linelength(struct vgamode_s *vmode_g, int val) +{ + stdvga_set_linelength(vmode_g, val); + if (bochsvga_dispi_enabled()) { + int pixels = (val * 8) / vga_bpp(vmode_g); + dispi_write(VBE_DISPI_INDEX_VIRT_WIDTH, pixels); + } + return 0; +} + +int +bochsvga_get_displaystart(struct vgamode_s *vmode_g) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_get_displaystart(vmode_g); + 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; +} + +int +bochsvga_set_displaystart(struct vgamode_s *vmode_g, int val) +{ + stdvga_set_displaystart(vmode_g, val); + if (bochsvga_dispi_enabled()) { + int bpp = vga_bpp(vmode_g); + int linelength = dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * bpp / 8; + if (!linelength) + return 0; + dispi_write(VBE_DISPI_INDEX_X_OFFSET, (val % linelength) * 8 / bpp); + dispi_write(VBE_DISPI_INDEX_Y_OFFSET, val / linelength); + } + return 0; +} + +int +bochsvga_get_dacformat(struct vgamode_s *vmode_g) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_get_dacformat(vmode_g); + u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE); + return (en & VBE_DISPI_8BIT_DAC) ? 8 : 6; +} + +int +bochsvga_set_dacformat(struct vgamode_s *vmode_g, int val) +{ + if (!bochsvga_dispi_enabled()) + return stdvga_set_dacformat(vmode_g, val); + u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE); + if (val == 6) + en &= ~VBE_DISPI_8BIT_DAC; + else if (val == 8) + en |= VBE_DISPI_8BIT_DAC; + else + return -1; + dispi_write(VBE_DISPI_INDEX_ENABLE, en); + return 0; +} + +static int +bochsvga_save_state(u16 seg, u16 *info) +{ + u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE); + SET_FARVAR(seg, *info, en); + info++; + if (!(en & VBE_DISPI_ENABLED)) + return 0; + int i; + for (i = VBE_DISPI_INDEX_XRES; i <= VBE_DISPI_INDEX_Y_OFFSET; i++) + if (i != VBE_DISPI_INDEX_ENABLE) { + u16 v = dispi_read(i); + SET_FARVAR(seg, *info, v); + info++; + } + return 0; +} + +static int +bochsvga_restore_state(u16 seg, u16 *info) +{ + u16 en = GET_FARVAR(seg, *info); + info++; + if (!(en & VBE_DISPI_ENABLED)) { + dispi_write(VBE_DISPI_INDEX_ENABLE, en); + return 0; + } + int i; + for (i = VBE_DISPI_INDEX_XRES; i <= VBE_DISPI_INDEX_Y_OFFSET; i++) + if (i == VBE_DISPI_INDEX_ENABLE) { + dispi_write(i, en); + } else { + dispi_write(i, GET_FARVAR(seg, *info)); + info++; + } + return 0; +} + +int +bochsvga_save_restore(int cmd, u16 seg, void *data) +{ + int ret = stdvga_save_restore(cmd, seg, data); + if (ret < 0 || !(cmd & SR_REGISTERS) || !GET_GLOBAL(dispi_found)) + return ret; + + u16 *info = (data + ret); + if (cmd & SR_SAVE) + bochsvga_save_state(seg, info); + if (cmd & SR_RESTORE) + bochsvga_restore_state(seg, info); + return ret + (VBE_DISPI_INDEX_Y_OFFSET-VBE_DISPI_INDEX_XRES+1)*sizeof(u16); +} + + +/**************************************************************** + * Mode setting + ****************************************************************/ + +int +bochsvga_set_mode(struct vgamode_s *vmode_g, int flags) +{ + if (GET_GLOBAL(dispi_found)) + dispi_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED); + if (! is_bochsvga_mode(vmode_g)) + return stdvga_set_mode(vmode_g, flags); + if (!GET_GLOBAL(dispi_found)) + return -1; + + u8 memmodel = GET_GLOBAL(vmode_g->memmodel); + if (memmodel == MM_PLANAR) + stdvga_set_mode(stdvga_find_mode(0x6a), 0); + if (memmodel == MM_PACKED && !(flags & MF_NOPALETTE)) + stdvga_set_packed_palette(); + + dispi_write(VBE_DISPI_INDEX_BPP, GET_GLOBAL(vmode_g->depth)); + u16 width = GET_GLOBAL(vmode_g->width); + u16 height = GET_GLOBAL(vmode_g->height); + 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 */ + u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS; + stdvga_crtc_write(crtc_addr, 0x11, 0x00); + stdvga_crtc_write(crtc_addr, 0x01, width / 8 - 1); + stdvga_set_linelength(vmode_g, width); + stdvga_crtc_write(crtc_addr, 0x12, height - 1); + u8 v = 0; + if ((height - 1) & 0x0100) + v |= 0x02; + if ((height - 1) & 0x0200) + v |= 0x40; + stdvga_crtc_mask(crtc_addr, 0x07, 0x42, v); + + stdvga_crtc_write(crtc_addr, 0x09, 0x00); + stdvga_crtc_mask(crtc_addr, 0x17, 0x00, 0x03); + stdvga_attr_mask(0x10, 0x00, 0x01); + stdvga_grdc_write(0x06, 0x05); + stdvga_sequ_write(0x02, 0x0f); + if (memmodel != MM_PLANAR) { + stdvga_crtc_mask(crtc_addr, 0x14, 0x00, 0x40); + stdvga_attr_mask(0x10, 0x00, 0x40); + stdvga_sequ_mask(0x04, 0x00, 0x08); + stdvga_grdc_mask(0x05, 0x20, 0x40); + } + stdvga_attrindex_write(0x20); + + return 0; +} + + +/**************************************************************** + * Init + ****************************************************************/ + +int +bochsvga_setup(void) +{ + int ret = stdvga_setup(); + 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, falling back to stdvga\n"); + return 0; + } + + dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID5); + SET_VGA(dispi_found, 1); + + if (GET_GLOBAL(HaveRunInit)) + return 0; + + u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS; + u32 io_addr = 0; + int bdf = GET_GLOBAL(VgaBDF); + if (CONFIG_VGA_PCI && bdf >= 0) { + u16 vendor = pci_config_readw(bdf, PCI_VENDOR_ID); + int barid, bar; + switch (vendor) { + case 0x15ad: /* qemu vmware vga */ + barid = 1; + break; + case 0x1234: /* stdvga */ + bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_2); + io_addr = bar & PCI_BASE_ADDRESS_IO_MASK; + barid = 0; + break; + default: /* qxl, virtio */ + barid = 0; + break; + } + bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_0 + barid * 4); + 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); + } + + 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_win_granularity, 64); + SET_VGA(VBE_capabilities, VBE_CAPABILITY_8BIT_DAC); + + dprintf(1, "VBE DISPI: lfb_addr=%x, size %d MB\n", + lfb_addr, totalmem >> 20); + + // 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 generic_svga_mode *m = svga_modes; + unsigned int mcount = GET_GLOBAL(svga_mcount); + for (; m < &svga_modes[mcount]; 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) + * stdvga_vram_ratio(&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); + } + } + + if (io_addr) { + int i; + u8 *edid = (void*)(io_addr); + for (i = 0; i < sizeof(VBE_edid); i++) + SET_VGA(VBE_edid[i], readb(edid + i)); + } + + return 0; +} |