[Xen-devel] [PATCH 09 of 15] hvmloader: refactor BIOS info setup

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1306917395 -3600
# Node ID 99820702549e428fd961b160afa1dae75bc7010d
# Parent  3c920f4ec4f24e1c134749972d5762aa009ee3dc
hvmloader: refactor BIOS info setup

Currently we have ->bios_high_setup, which is called relatively early and 
returns
a cookie which is passed to ->bios_info_setup which runs towards the end and
creates the BIOS info, incorporating the cookie which (in the case of ROMBIOS)
happens to be the BIOS's high load address . This is rather ROMBIOS specific.

Refactor to have ->bios_info_setup which is called early and prepares the
bios_info, ->bios_relocate which does any necessary relocation (updating the
BIOS info as necessary) and ->bios_info_finish which finalises the info (e.g.
by calculating the checksum).

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r 3c920f4ec4f2 -r 99820702549e tools/firmware/hvmloader/config.h
--- a/tools/firmware/hvmloader/config.h Wed Jun 01 09:36:34 2011 +0100
+++ b/tools/firmware/hvmloader/config.h Wed Jun 01 09:36:35 2011 +0100
@@ -20,8 +20,10 @@ struct bios_config {
     int load_roms;
     unsigned int optionrom_start, optionrom_end;
 
-    uint32_t (*bios_high_setup)(void);
-    void (*bios_info_setup)(uint32_t);
+    void (*bios_info_setup)(void);
+    void (*bios_info_finish)(void);
+
+    void (*bios_relocate)(void);
 
     void (*vm86_setup)(void);
     void (*e820_setup)(void);
diff -r 3c920f4ec4f2 -r 99820702549e tools/firmware/hvmloader/hvmloader.c
--- a/tools/firmware/hvmloader/hvmloader.c      Wed Jun 01 09:36:34 2011 +0100
+++ b/tools/firmware/hvmloader/hvmloader.c      Wed Jun 01 09:36:35 2011 +0100
@@ -383,7 +383,6 @@ static const struct bios_config *detect_
 
 int main(void)
 {
-    uint32_t highbios = 0;
     const struct bios_config *bios;
     int option_rom_sz = 0, vgabios_sz = 0, etherboot_sz = 0;
     uint32_t etherboot_phys_addr = 0, option_rom_phys_addr = 0;
@@ -409,6 +408,9 @@ int main(void)
 
     perform_tests();
 
+    if (bios->bios_info_setup)
+        bios->bios_info_setup();
+
     if (bios->create_smbios_tables) {
         printf("Writing SMBIOS tables ...\n");
         bios->create_smbios_tables();
@@ -418,8 +420,8 @@ int main(void)
     memcpy((void *)bios->bios_address, bios->image,
            bios->image_size);
 
-    if (bios->bios_high_setup)
-        highbios = bios->bios_high_setup();
+    if (bios->bios_relocate)
+        bios->bios_relocate();
 
     if ( bios->create_mp_tables &&
          ( (hvm_info->nr_vcpus > 1) || hvm_info->apic_mode ) )
@@ -505,8 +507,8 @@ int main(void)
     if (bios->e820_setup)
         bios->e820_setup();
 
-    if (bios->bios_info_setup)
-        bios->bios_info_setup(highbios);
+    if (bios->bios_info_finish)
+        bios->bios_info_finish();
 
     xenbus_shutdown();
 
diff -r 3c920f4ec4f2 -r 99820702549e tools/firmware/hvmloader/rombios.c
--- a/tools/firmware/hvmloader/rombios.c        Wed Jun 01 09:36:34 2011 +0100
+++ b/tools/firmware/hvmloader/rombios.c        Wed Jun 01 09:36:35 2011 +0100
@@ -64,7 +64,7 @@ static void rombios_setup_e820(void)
     dump_e820_table(E820, *E820_NR);
 }
 
-static void rombios_setup_bios_info(uint32_t bioshigh)
+static void rombios_setup_bios_info(void)
 {
     struct bios_info *bios_info;
 
@@ -74,11 +74,28 @@ static void rombios_setup_bios_info(uint
     bios_info->com2_present = uart_exists(0x2f8);
     bios_info->lpt1_present = lpt_exists(0x378);
     bios_info->hpet_present = hpet_exists(ACPI_HPET_ADDRESS);
+    bios_info->madt_csum_addr = madt_csum_addr;
+    bios_info->madt_lapic0_addr = madt_lapic0_addr;
+}
+
+static void rombios_relocate(void)
+{
+    uint32_t bioshigh;
+    struct bios_info *bios_info;
+
+    bioshigh = rombios_highbios_setup();
+
+    bios_info = (struct bios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
+    bios_info->bios32_entry = bioshigh;
+}
+
+static void rombios_finish_bios_info(void)
+{
+    struct bios_info *bios_info;
+
+    bios_info = (struct bios_info *)BIOS_INFO_PHYSICAL_ADDRESS;
     bios_info->pci_min = pci_mem_start;
     bios_info->pci_len = pci_mem_end - pci_mem_start;
-    bios_info->madt_csum_addr = madt_csum_addr;
-    bios_info->madt_lapic0_addr = madt_lapic0_addr;
-    bios_info->bios32_entry = bioshigh;
 }
 
 /*
@@ -158,8 +175,10 @@ struct bios_config rombios_config =  {
     .optionrom_start = OPTIONROM_PHYSICAL_ADDRESS,
     .optionrom_end = OPTIONROM_PHYSICAL_END,
 
-    .bios_high_setup = rombios_highbios_setup,
     .bios_info_setup = rombios_setup_bios_info,
+    .bios_info_finish = rombios_finish_bios_info,
+
+    .bios_relocate = rombios_relocate,
 
     .vm86_setup = rombios_init_vm86_tss,
     .e820_setup = rombios_setup_e820,
diff -r 3c920f4ec4f2 -r 99820702549e tools/firmware/hvmloader/seabios.c
--- a/tools/firmware/hvmloader/seabios.c        Wed Jun 01 09:36:34 2011 +0100
+++ b/tools/firmware/hvmloader/seabios.c        Wed Jun 01 09:36:35 2011 +0100
@@ -44,6 +44,9 @@ struct bios_config seabios_config = {
     .optionrom_end = 0,
 
     .bios_info_setup = NULL,
+    .bios_info_finish = NULL,
+
+    .bios_relocate = NULL,
 
     .vm86_setup = NULL,
     .e820_setup = NULL,

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