--- /dev/null
+// Main VGA bios initialization
+//
+// 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" // SET_BDA
+#include "bregs.h" // struct bregs
+#include "hw/pci.h" // pci_config_readw
+#include "hw/pci_regs.h" // PCI_VENDOR_ID
+#include "hw/serialio.h" // serial_debug_preinit
+#include "output.h" // dprintf
+#include "std/optionrom.h" // struct pci_data
+#include "std/pmm.h" // struct pmmheader
+#include "string.h" // checksum_far
+#include "util.h" // VERSION
+#include "vgabios.h" // video_save_pointer_table
+#include "vgahw.h" // vgahw_setup
+
+struct video_save_pointer_s video_save_pointer_table VAR16;
+
+struct video_param_s video_param_table[29] VAR16;
+
+// Type of emulator platform - for dprintf with certain compile options.
+int PlatformRunningOn VAR16;
+
+
+/****************************************************************
+ * PCI Data
+ ****************************************************************/
+
+struct pci_data rom_pci_data VAR16 VISIBLE16 = {
+ .signature = PCI_ROM_SIGNATURE,
+ .vendor = CONFIG_VGA_VID,
+ .device = CONFIG_VGA_DID,
+ .dlen = 0x18,
+ .class_hi = 0x300,
+ .irevision = 1,
+ .type = PCIROM_CODETYPE_X86,
+ .indicator = 0x80,
+};
+
+
+/****************************************************************
+ * PMM call and extra stack setup
+ ****************************************************************/
+
+u16 ExtraStackSeg VAR16 VISIBLE16;
+
+static void
+allocate_extra_stack(void)
+{
+ if (!CONFIG_VGA_ALLOCATE_EXTRA_STACK)
+ return;
+ u32 pmmscan;
+ for (pmmscan=0; pmmscan < BUILD_BIOS_SIZE; pmmscan+=16) {
+ struct pmmheader *pmm = (void*)pmmscan;
+ if (GET_FARVAR(SEG_BIOS, pmm->signature) != PMM_SIGNATURE)
+ continue;
+ if (checksum_far(SEG_BIOS, pmm, GET_FARVAR(SEG_BIOS, pmm->length)))
+ continue;
+ struct segoff_s entry = GET_FARVAR(SEG_BIOS, pmm->entry);
+ dprintf(1, "Attempting to allocate VGA stack via pmm call to %04x:%04x\n"
+ , entry.seg, entry.offset);
+ u16 res1, res2;
+ asm volatile(
+ "pushl %0\n"
+ "pushw $(8|1)\n" // Permanent low memory request
+ "pushl $0xffffffff\n" // Anonymous handle
+ "pushl $" __stringify(CONFIG_VGA_EXTRA_STACK_SIZE/16) "\n"
+ "pushw $0x00\n" // PMM allocation request
+ "lcallw *12(%%esp)\n"
+ "addl $16, %%esp\n"
+ "cli\n"
+ "cld\n"
+ : "+r" (entry.segoff), "=a" (res1), "=d" (res2) : : "cc", "memory");
+ u32 res = res1 | (res2 << 16);
+ if (!res || res == PMM_FUNCTION_NOT_SUPPORTED)
+ return;
+ dprintf(1, "VGA stack allocated at %x\n", res);
+ SET_VGA(ExtraStackSeg, res >> 4);
+ extern void entry_10_extrastack(void);
+ SET_IVT(0x10, SEGOFF(get_global_seg(), (u32)entry_10_extrastack));
+ return;
+ }
+}
+
+
+/****************************************************************
+ * Timer hook
+ ****************************************************************/
+
+struct segoff_s Timer_Hook_Resume VAR16 VISIBLE16;
+
+void VISIBLE16
+handle_timer_hook(void)
+{
+ if (!vga_emulate_text())
+ return;
+ vgafb_set_swcursor(GET_BDA(timer_counter) % 18 < 9);
+}
+
+static void
+hook_timer_irq(void)
+{
+ if (!CONFIG_VGA_EMULATE_TEXT)
+ return;
+ extern void entry_timer_hook(void);
+ extern void entry_timer_hook_extrastack(void);
+ struct segoff_s oldirq = GET_IVT(0x08);
+ struct segoff_s newirq = SEGOFF(get_global_seg(), (u32)entry_timer_hook);
+ if (CONFIG_VGA_ALLOCATE_EXTRA_STACK && GET_GLOBAL(ExtraStackSeg))
+ newirq = SEGOFF(get_global_seg(), (u32)entry_timer_hook_extrastack);
+ dprintf(1, "Hooking hardware timer irq (old=%x new=%x)\n"
+ , oldirq.segoff, newirq.segoff);
+ SET_VGA(Timer_Hook_Resume, oldirq);
+ SET_IVT(0x08, newirq);
+}
+
+
+/****************************************************************
+ * VGA post
+ ****************************************************************/
+
+static void
+init_bios_area(void)
+{
+ // init detected hardware BIOS Area
+ // set 80x25 color (not clear from RBIL but usual)
+ set_equipment_flags(0x30, 0x20);
+
+ // Set the basic modeset options
+ SET_BDA(modeset_ctl, 0x51);
+
+ SET_BDA(dcc_index, CONFIG_VGA_STDVGA_PORTS ? 0x08 : 0xff);
+ SET_BDA(video_savetable
+ , SEGOFF(get_global_seg(), (u32)&video_save_pointer_table));
+
+ // FIXME
+ SET_BDA(video_msr, 0x00); // Unavailable on vanilla vga, but...
+ SET_BDA(video_pal, 0x00); // Unavailable on vanilla vga, but...
+}
+
+int VgaBDF VAR16 = -1;
+int HaveRunInit VAR16;
+
+void VISIBLE16
+vga_post(struct bregs *regs)
+{
+ serial_debug_preinit();
+ dprintf(1, "Start SeaVGABIOS (version %s)\n", VERSION);
+ debug_enter(regs, DEBUG_VGA_POST);
+
+ if (CONFIG_VGA_PCI && !GET_GLOBAL(HaveRunInit)) {
+ u16 bdf = regs->ax;
+ if ((pci_config_readw(bdf, PCI_VENDOR_ID)
+ == GET_GLOBAL(rom_pci_data.vendor))
+ && (pci_config_readw(bdf, PCI_DEVICE_ID)
+ == GET_GLOBAL(rom_pci_data.device)))
+ SET_VGA(VgaBDF, bdf);
+ }
+
+ int ret = vgahw_setup();
+ if (ret) {
+ dprintf(1, "Failed to initialize VGA hardware. Exiting.\n");
+ return;
+ }
+
+ if (GET_GLOBAL(HaveRunInit))
+ return;
+
+ init_bios_area();
+
+ SET_VGA(video_save_pointer_table.videoparam
+ , SEGOFF(get_global_seg(), (u32)video_param_table));
+ if (CONFIG_VGA_STDVGA_PORTS)
+ stdvga_build_video_param();
+
+ extern void entry_10(void);
+ SET_IVT(0x10, SEGOFF(get_global_seg(), (u32)entry_10));
+
+ allocate_extra_stack();
+
+ hook_timer_irq();
+
+ SET_VGA(HaveRunInit, 1);
+
+ // Fixup checksum
+ extern u8 _rom_header_size, _rom_header_checksum;
+ SET_VGA(_rom_header_checksum, 0);
+ u8 sum = -checksum_far(get_global_seg(), 0,
+ GET_GLOBAL(_rom_header_size) * 512);
+ SET_VGA(_rom_header_checksum, sum);
+}
Code Review / kvmfornfv.git / blobdiff