Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 475 insertions, 0 deletions

diff --git a/qemu/roms/seabios/src/optionroms.c b/qemu/roms/seabios/src/optionroms.c
new file mode 100644
index 000000000..93d9d2fe6
--- /dev/null
+++ b/qemu/roms/seabios/src/optionroms.c
@@ -0,0 +1,475 @@
+// Option rom scanning code.
+//
+// Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2002  MandrakeSoft S.A.
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "bregs.h" // struct bregs
+#include "config.h" // CONFIG_*
+#include "farptr.h" // FLATPTR_TO_SEG
+#include "hw/pci.h" // foreachpci
+#include "hw/pci_ids.h" // PCI_CLASS_DISPLAY_VGA
+#include "hw/pci_regs.h" // PCI_ROM_ADDRESS
+#include "malloc.h" // rom_confirm
+#include "output.h" // dprintf
+#include "romfile.h" // romfile_loadint
+#include "stacks.h" // farcall16big
+#include "std/optionrom.h" // struct rom_header
+#include "std/pnpbios.h" // PNP_SIGNATURE
+#include "string.h" // memset
+#include "util.h" // get_pnp_offset
+
+
+/****************************************************************
+ * Helper functions
+ ****************************************************************/
+
+// Execute a given option rom.
+static void
+__callrom(struct rom_header *rom, u16 offset, u16 bdf)
+{
+    u16 seg = FLATPTR_TO_SEG(rom);
+    dprintf(1, "Running option rom at %04x:%04x\n", seg, offset);
+
+    struct bregs br;
+    memset(&br, 0, sizeof(br));
+    br.flags = F_IF;
+    br.ax = bdf;
+    br.bx = 0xffff;
+    br.dx = 0xffff;
+    br.es = SEG_BIOS;
+    br.di = get_pnp_offset();
+    br.code = SEGOFF(seg, offset);
+    start_preempt();
+    farcall16big(&br);
+    finish_preempt();
+}
+
+// Execute a given option rom at the standard entry vector.
+void
+callrom(struct rom_header *rom, u16 bdf)
+{
+    __callrom(rom, OPTION_ROM_INITVECTOR, bdf);
+}
+
+// Execute a BCV option rom registered via add_bcv().
+void
+call_bcv(u16 seg, u16 ip)
+{
+    __callrom(MAKE_FLATPTR(seg, 0), ip, 0);
+}
+
+static int EnforceChecksum;
+
+// Verify that an option rom looks valid
+static int
+is_valid_rom(struct rom_header *rom)
+{
+    dprintf(6, "Checking rom %p (sig %x size %d)\n"
+            , rom, rom->signature, rom->size);
+    if (rom->signature != OPTION_ROM_SIGNATURE)
+        return 0;
+    if (! rom->size)
+        return 0;
+    u32 len = rom->size * 512;
+    u8 sum = checksum(rom, len);
+    if (sum != 0) {
+        dprintf(1, "Found option rom with bad checksum: loc=%p len=%d sum=%x\n"
+                , rom, len, sum);
+        if (EnforceChecksum)
+            return 0;
+    }
+    return 1;
+}
+
+// Check if a valid option rom has a pnp struct; return it if so.
+static struct pnp_data *
+get_pnp_rom(struct rom_header *rom)
+{
+    struct pnp_data *pnp = (void*)((u8*)rom + rom->pnpoffset);
+    if (pnp->signature != PNP_SIGNATURE)
+        return NULL;
+    return pnp;
+}
+
+// Check for multiple pnp option rom headers.
+static struct pnp_data *
+get_pnp_next(struct rom_header *rom, struct pnp_data *pnp)
+{
+    if (! pnp->nextoffset)
+        return NULL;
+    pnp = (void*)((u8*)rom + pnp->nextoffset);
+    if (pnp->signature != PNP_SIGNATURE)
+        return NULL;
+    return pnp;
+}
+
+// Check if a valid option rom has a pci struct; return it if so.
+static struct pci_data *
+get_pci_rom(struct rom_header *rom)
+{
+    struct pci_data *pd = (void*)((u32)rom + rom->pcioffset);
+    if (pd->signature != PCI_ROM_SIGNATURE)
+        return NULL;
+    if (rom->pcioffset & 3)
+        dprintf(1, "WARNING! Found unaligned PCI rom (vd=%04x:%04x)\n"
+                , pd->vendor, pd->device);
+    return pd;
+}
+
+// Run rom init code and note rom size.
+static int
+init_optionrom(struct rom_header *rom, u16 bdf, int isvga)
+{
+    if (! is_valid_rom(rom))
+        return -1;
+    struct rom_header *newrom = rom_reserve(rom->size * 512);
+    if (!newrom) {
+        warn_noalloc();
+        return -1;
+    }
+    if (newrom != rom)
+        memmove(newrom, rom, rom->size * 512);
+
+    if (isvga || get_pnp_rom(newrom))
+        // Only init vga and PnP roms here.
+        callrom(newrom, bdf);
+
+    return rom_confirm(newrom->size * 512);
+}
+
+#define RS_PCIROM (1LL<<33)
+
+static void
+setRomSource(u64 *sources, struct rom_header *rom, u64 source)
+{
+    if (sources)
+        sources[((u32)rom - BUILD_ROM_START) / OPTION_ROM_ALIGN] = source;
+}
+
+static int
+getRomPriority(u64 *sources, struct rom_header *rom, int instance)
+{
+    u64 source = sources[((u32)rom - BUILD_ROM_START) / OPTION_ROM_ALIGN];
+    if (!source)
+        return -1;
+    if (source & RS_PCIROM)
+        return bootprio_find_pci_rom((void*)(u32)source, instance);
+    struct romfile_s *file = (void*)(u32)source;
+    return bootprio_find_named_rom(file->name, instance);
+}
+
+
+/****************************************************************
+ * Roms in CBFS
+ ****************************************************************/
+
+static struct rom_header *
+deploy_romfile(struct romfile_s *file)
+{
+    u32 size = file->size;
+    struct rom_header *rom = rom_reserve(size);
+    if (!rom) {
+        warn_noalloc();
+        return NULL;
+    }
+    int ret = file->copy(file, rom, size);
+    if (ret <= 0)
+        return NULL;
+    return rom;
+}
+
+// Check if an option rom is at a hardcoded location or in CBFS.
+static struct rom_header *
+lookup_hardcode(struct pci_device *pci)
+{
+    char fname[17];
+    snprintf(fname, sizeof(fname), "pci%04x,%04x.rom"
+             , pci->vendor, pci->device);
+    struct romfile_s *file = romfile_find(fname);
+    if (file)
+        return deploy_romfile(file);
+    return NULL;
+}
+
+// Run all roms in a given CBFS directory.
+static void
+run_file_roms(const char *prefix, int isvga, u64 *sources)
+{
+    struct romfile_s *file = NULL;
+    for (;;) {
+        file = romfile_findprefix(prefix, file);
+        if (!file)
+            break;
+        struct rom_header *rom = deploy_romfile(file);
+        if (rom) {
+            setRomSource(sources, rom, (u32)file);
+            init_optionrom(rom, 0, isvga);
+        }
+    }
+}
+
+
+/****************************************************************
+ * PCI roms
+ ****************************************************************/
+
+// Verify device is a vga device with legacy address decoding enabled.
+int
+is_pci_vga(struct pci_device *pci)
+{
+    if (pci->class != PCI_CLASS_DISPLAY_VGA)
+        return 0;
+    u16 cmd = pci_config_readw(pci->bdf, PCI_COMMAND);
+    if (!(cmd & PCI_COMMAND_IO && cmd & PCI_COMMAND_MEMORY))
+        return 0;
+    while (pci->parent) {
+        pci = pci->parent;
+        u32 ctrl = pci_config_readb(pci->bdf, PCI_BRIDGE_CONTROL);
+        if (!(ctrl & PCI_BRIDGE_CTL_VGA))
+            return 0;
+    }
+    return 1;
+}
+
+// Copy a rom to its permanent location below 1MiB
+static struct rom_header *
+copy_rom(struct rom_header *rom)
+{
+    u32 romsize = rom->size * 512;
+    struct rom_header *newrom = rom_reserve(romsize);
+    if (!newrom) {
+        warn_noalloc();
+        return NULL;
+    }
+    dprintf(4, "Copying option rom (size %d) from %p to %p\n"
+            , romsize, rom, newrom);
+    iomemcpy(newrom, rom, romsize);
+    return newrom;
+}
+
+// Map the option rom of a given PCI device.
+static struct rom_header *
+map_pcirom(struct pci_device *pci)
+{
+    u16 bdf = pci->bdf;
+    dprintf(6, "Attempting to map option rom on dev %02x:%02x.%x\n"
+            , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf));
+
+    if ((pci->header_type & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
+        dprintf(6, "Skipping non-normal pci device (type=%x)\n"
+                , pci->header_type);
+        return NULL;
+    }
+
+    u32 orig = pci_config_readl(bdf, PCI_ROM_ADDRESS);
+    pci_config_writel(bdf, PCI_ROM_ADDRESS, ~PCI_ROM_ADDRESS_ENABLE);
+    u32 sz = pci_config_readl(bdf, PCI_ROM_ADDRESS);
+
+    dprintf(6, "Option rom sizing returned %x %x\n", orig, sz);
+    orig &= ~PCI_ROM_ADDRESS_ENABLE;
+    if (!sz || sz == 0xffffffff)
+        goto fail;
+
+    if (orig == sz || (u32)(orig + 4*1024*1024) < 20*1024*1024) {
+        // Don't try to map to a pci addresses at its max, in the last
+        // 4MiB of ram, or the first 16MiB of ram.
+        dprintf(6, "Preset rom address doesn't look valid\n");
+        goto fail;
+    }
+
+    // Looks like a rom - enable it.
+    pci_config_writel(bdf, PCI_ROM_ADDRESS, orig | PCI_ROM_ADDRESS_ENABLE);
+
+    struct rom_header *rom = (void*)orig;
+    for (;;) {
+        dprintf(5, "Inspecting possible rom at %p (vd=%04x:%04x"
+                " bdf=%02x:%02x.%x)\n"
+                , rom, pci->vendor, pci->device
+                , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf));
+        if (rom->signature != OPTION_ROM_SIGNATURE) {
+            dprintf(6, "No option rom signature (got %x)\n", rom->signature);
+            goto fail;
+        }
+        struct pci_data *pd = get_pci_rom(rom);
+        if (! pd) {
+            dprintf(6, "No valid pci signature found\n");
+            goto fail;
+        }
+
+        if (pd->vendor == pci->vendor && pd->device == pci->device
+            && pd->type == PCIROM_CODETYPE_X86)
+            // A match
+            break;
+        dprintf(6, "Didn't match dev/ven (got %04x:%04x) or type (got %d)\n"
+                , pd->vendor, pd->device, pd->type);
+        if (pd->indicator & 0x80) {
+            dprintf(6, "No more images left\n");
+            goto fail;
+        }
+        rom = (void*)((u32)rom + pd->ilen * 512);
+    }
+
+    rom = copy_rom(rom);
+    pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
+    return rom;
+fail:
+    // Not valid - restore original and exit.
+    pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
+    return NULL;
+}
+
+// Attempt to map and initialize the option rom on a given PCI device.
+static int
+init_pcirom(struct pci_device *pci, int isvga, u64 *sources)
+{
+    u16 bdf = pci->bdf;
+    dprintf(4, "Attempting to init PCI bdf %02x:%02x.%x (vd %04x:%04x)\n"
+            , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
+            , pci->vendor, pci->device);
+    struct rom_header *rom = lookup_hardcode(pci);
+    if (! rom)
+        rom = map_pcirom(pci);
+    if (! rom)
+        // No ROM present.
+        return -1;
+    setRomSource(sources, rom, RS_PCIROM | (u32)pci);
+    return init_optionrom(rom, bdf, isvga);
+}
+
+
+/****************************************************************
+ * Non-VGA option rom init
+ ****************************************************************/
+
+void
+optionrom_setup(void)
+{
+    if (! CONFIG_OPTIONROMS)
+        return;
+
+    dprintf(1, "Scan for option roms\n");
+    u64 sources[(BUILD_BIOS_ADDR - BUILD_ROM_START) / OPTION_ROM_ALIGN];
+    memset(sources, 0, sizeof(sources));
+    u32 post_vga = rom_get_last();
+
+    if (CONFIG_OPTIONROMS_DEPLOYED) {
+        // Option roms are already deployed on the system.
+        u32 pos = post_vga;
+        while (pos < rom_get_max()) {
+            int ret = init_optionrom((void*)pos, 0, 0);
+            if (ret)
+                pos += OPTION_ROM_ALIGN;
+            else
+                pos = rom_get_last();
+        }
+    } else {
+        // Find and deploy PCI roms.
+        struct pci_device *pci;
+        foreachpci(pci) {
+            if (pci->class == PCI_CLASS_DISPLAY_VGA || pci->have_driver)
+                continue;
+            init_pcirom(pci, 0, sources);
+        }
+
+        // Find and deploy CBFS roms not associated with a device.
+        run_file_roms("genroms/", 0, sources);
+    }
+    rom_reserve(0);
+
+    // All option roms found and deployed - now build BEV/BCV vectors.
+
+    u32 pos = post_vga;
+    while (pos < rom_get_last()) {
+        struct rom_header *rom = (void*)pos;
+        if (! is_valid_rom(rom)) {
+            pos += OPTION_ROM_ALIGN;
+            continue;
+        }
+        pos += ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
+        struct pnp_data *pnp = get_pnp_rom(rom);
+        if (! pnp) {
+            // Legacy rom.
+            boot_add_bcv(FLATPTR_TO_SEG(rom), OPTION_ROM_INITVECTOR, 0
+                         , getRomPriority(sources, rom, 0));
+            continue;
+        }
+        // PnP rom - check for BEV and BCV boot capabilities.
+        int instance = 0;
+        while (pnp) {
+            if (pnp->bev)
+                boot_add_bev(FLATPTR_TO_SEG(rom), pnp->bev, pnp->productname
+                             , getRomPriority(sources, rom, instance++));
+            else if (pnp->bcv)
+                boot_add_bcv(FLATPTR_TO_SEG(rom), pnp->bcv, pnp->productname
+                             , getRomPriority(sources, rom, instance++));
+            else
+                break;
+            pnp = get_pnp_next(rom, pnp);
+        }
+    }
+}
+
+
+/****************************************************************
+ * VGA init
+ ****************************************************************/
+
+static int S3ResumeVga;
+int ScreenAndDebug;
+struct rom_header *VgaROM;
+
+// Call into vga code to turn on console.
+void
+vgarom_setup(void)
+{
+    if (! CONFIG_OPTIONROMS)
+        return;
+
+    dprintf(1, "Scan for VGA option rom\n");
+
+    // Load some config settings that impact VGA.
+    EnforceChecksum = romfile_loadint("etc/optionroms-checksum", 1);
+    S3ResumeVga = romfile_loadint("etc/s3-resume-vga-init", CONFIG_QEMU);
+    ScreenAndDebug = romfile_loadint("etc/screen-and-debug", 1);
+
+    if (CONFIG_OPTIONROMS_DEPLOYED) {
+        // Option roms are already deployed on the system.
+        init_optionrom((void*)BUILD_ROM_START, 0, 1);
+    } else {
+        // Clear option rom memory
+        memset((void*)BUILD_ROM_START, 0, rom_get_max() - BUILD_ROM_START);
+
+        // Find and deploy PCI VGA rom.
+        struct pci_device *pci;
+        foreachpci(pci) {
+            if (!is_pci_vga(pci))
+                continue;
+            vgahook_setup(pci);
+            init_pcirom(pci, 1, NULL);
+            break;
+        }
+
+        // Find and deploy CBFS vga-style roms not associated with a device.
+        run_file_roms("vgaroms/", 1, NULL);
+    }
+    rom_reserve(0);
+
+    if (rom_get_last() == BUILD_ROM_START)
+        // No VGA rom found
+        return;
+
+    VgaROM = (void*)BUILD_ROM_START;
+    enable_vga_console();
+}
+
+void
+s3_resume_vga(void)
+{
+    if (!S3ResumeVga)
+        return;
+    if (!VgaROM || ! is_valid_rom(VgaROM))
+        return;
+    callrom(VgaROM, 0);
+}