[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] pc_sysfw: Always use alias for ISA BIOS region
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [PATCH] pc_sysfw: Always use alias for ISA BIOS region |
Date: |
Thu, 01 Nov 2012 18:17:42 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2012-11-01 18:15, Jordan Justen wrote:
> Would the old behavior need to be preserved for pc-1.1 & pc-1.2?
Why? This is just restoring the older, correct behavior.
Jan
>
> -Jordan
>
> On Thu, Nov 1, 2012 at 9:32 AM, Jan Kiszka <address@hidden> wrote:
>> From: Jan Kiszka <address@hidden>
>>
>> This is no technical reason (anymore) for copying the ISA BIOS from the
>> original region. Instead, refactor pc_isa_bios_init to serve both pflash
>> and old-style BIOS setup.
>>
>> Signed-off-by: Jan Kiszka <address@hidden>
>> ---
>> hw/pc_sysfw.c | 42 +++++++++---------------------------------
>> 1 files changed, 9 insertions(+), 33 deletions(-)
>>
>> diff --git a/hw/pc_sysfw.c b/hw/pc_sysfw.c
>> index 9d7c5f4..07627df 100644
>> --- a/hw/pc_sysfw.c
>> +++ b/hw/pc_sysfw.c
>> @@ -41,36 +41,24 @@ typedef struct PcSysFwDevice {
>> } PcSysFwDevice;
>>
>> static void pc_isa_bios_init(MemoryRegion *rom_memory,
>> - MemoryRegion *flash_mem,
>> - int ram_size)
>> + MemoryRegion *bios)
>> {
>> + uint64_t bios_size = memory_region_size(bios);
>> int isa_bios_size;
>> MemoryRegion *isa_bios;
>> - uint64_t flash_size;
>> - void *flash_ptr, *isa_bios_ptr;
>> -
>> - flash_size = memory_region_size(flash_mem);
>>
>> /* map the last 128KB of the BIOS in ISA space */
>> - isa_bios_size = flash_size;
>> + isa_bios_size = bios_size;
>> if (isa_bios_size > (128 * 1024)) {
>> isa_bios_size = 128 * 1024;
>> }
>> isa_bios = g_malloc(sizeof(*isa_bios));
>> - memory_region_init_ram(isa_bios, "isa-bios", isa_bios_size);
>> - vmstate_register_ram_global(isa_bios);
>> + memory_region_init_alias(isa_bios, "isa-bios", bios,
>> + bios_size - isa_bios_size, isa_bios_size);
>> memory_region_add_subregion_overlap(rom_memory,
>> 0x100000 - isa_bios_size,
>> isa_bios,
>> 1);
>> -
>> - /* copy ISA rom image from top of flash memory */
>> - flash_ptr = memory_region_get_ram_ptr(flash_mem);
>> - isa_bios_ptr = memory_region_get_ram_ptr(isa_bios);
>> - memcpy(isa_bios_ptr,
>> - ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size),
>> - isa_bios_size);
>> -
>> memory_region_set_readonly(isa_bios, true);
>> }
>>
>> @@ -129,14 +117,14 @@ static void pc_system_flash_init(MemoryRegion
>> *rom_memory,
>> 1, 0x0000, 0x0000, 0x0000, 0x0000,
>> 0);
>> flash_mem = pflash_cfi01_get_memory(system_flash);
>>
>> - pc_isa_bios_init(rom_memory, flash_mem, size);
>> + pc_isa_bios_init(rom_memory, flash_mem);
>> }
>>
>> static void old_pc_system_rom_init(MemoryRegion *rom_memory)
>> {
>> char *filename;
>> - MemoryRegion *bios, *isa_bios;
>> - int bios_size, isa_bios_size;
>> + MemoryRegion *bios;
>> + int bios_size;
>> int ret;
>>
>> /* BIOS load */
>> @@ -167,19 +155,7 @@ static void old_pc_system_rom_init(MemoryRegion
>> *rom_memory)
>> g_free(filename);
>> }
>>
>> - /* map the last 128KB of the BIOS in ISA space */
>> - isa_bios_size = bios_size;
>> - if (isa_bios_size > (128 * 1024)) {
>> - isa_bios_size = 128 * 1024;
>> - }
>> - isa_bios = g_malloc(sizeof(*isa_bios));
>> - memory_region_init_alias(isa_bios, "isa-bios", bios,
>> - bios_size - isa_bios_size, isa_bios_size);
>> - memory_region_add_subregion_overlap(rom_memory,
>> - 0x100000 - isa_bios_size,
>> - isa_bios,
>> - 1);
>> - memory_region_set_readonly(isa_bios, true);
>> + pc_isa_bios_init(rom_memory, bios);
>>
>> /* map all the bios at the top of memory */
>> memory_region_add_subregion(rom_memory,
>> --
>> 1.7.3.4
signature.asc
Description: OpenPGP digital signature
[Qemu-devel] [PATCH v2] pc_sysfw: Always use alias for ISA BIOS region, Jan Kiszka, 2012/11/02