Re: [Qemu-devel] [PATCH v3] hw/pc: Support system flash memory with -pflash parameter

[Jordan Justen <jljusten@gmail.com>]

On Fri, Jun 3, 2011 at 13:36, Aurelien Jarno <aurelien@aurel32.net> wrote:
> Ping? Cc:ed Anthony the maintainer of pc.c

Sorry, I've been meaning to rebase this and add your reviewed-by.

Would that be the right next step in this case?

-Jordan

>
> On Mon, Apr 18, 2011 at 10:46:40AM +0200, Aurelien Jarno wrote:
>> On Thu, Mar 31, 2011 at 11:25:26AM -0700, Jordan Justen wrote:
>> > If -pflash is specified and -bios is specified then pflash will
>> > be mapped just below the system rom using hw/pflash_cfi01.c.
>> >
>> > If -pflash is specified on the command line, but -bios is
>> > not specified, then 'bios.bin' will NOT be loaded, and
>> > instead the -pflash flash image will be mapped just below
>> > 4GB in place of the normal rom image.
>> >
>> > Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
>> > ---
>> >  default-configs/i386-softmmu.mak   |    1 +
>> >  default-configs/x86_64-softmmu.mak |    1 +
>> >  hw/pc.c                            |  161 +++++++++++++++++++++++++++---------
>> >  3 files changed, 125 insertions(+), 38 deletions(-)
>>
>> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
>>
>> > diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
>> > index 55589fa..8697cd4 100644
>> > --- a/default-configs/i386-softmmu.mak
>> > +++ b/default-configs/i386-softmmu.mak
>> > @@ -21,3 +21,4 @@ CONFIG_PIIX_PCI=y
>> >  CONFIG_SOUND=y
>> >  CONFIG_HPET=y
>> >  CONFIG_APPLESMC=y
>> > +CONFIG_PFLASH_CFI01=y
>> > diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
>> > index 8895028..eca9284 100644
>> > --- a/default-configs/x86_64-softmmu.mak
>> > +++ b/default-configs/x86_64-softmmu.mak
>> > @@ -21,3 +21,4 @@ CONFIG_PIIX_PCI=y
>> >  CONFIG_SOUND=y
>> >  CONFIG_HPET=y
>> >  CONFIG_APPLESMC=y
>> > +CONFIG_PFLASH_CFI01=y
>> > diff --git a/hw/pc.c b/hw/pc.c
>> > index 6939c04..4812310 100644
>> > --- a/hw/pc.c
>> > +++ b/hw/pc.c
>> > @@ -41,6 +41,7 @@
>> >  #include "sysemu.h"
>> >  #include "blockdev.h"
>> >  #include "ui/qemu-spice.h"
>> > +#include "flash.h"
>> >
>> >  /* output Bochs bios info messages */
>> >  //#define DEBUG_BIOS
>> > @@ -957,6 +958,124 @@ void pc_cpus_init(const char *cpu_model)
>> >      }
>> >  }
>> >
>> > +static void pc_isa_bios_init(ram_addr_t ram_offset, int ram_size)
>> > +{
>> > +    int isa_bios_size;
>> > +
>> > +    /* map the last 128KB of the BIOS in ISA space */
>> > +    isa_bios_size = ram_size;
>> > +    if (isa_bios_size > (128 * 1024)) {
>> > +        isa_bios_size = 128 * 1024;
>> > +    }
>> > +    ram_offset = ram_offset + ram_size - isa_bios_size;
>> > +    cpu_register_physical_memory(0x100000 - isa_bios_size,
>> > +                                 isa_bios_size,
>> > +                                 ram_offset | IO_MEM_ROM);
>> > +}
>> > +
>> > +static int pc_system_rom_init(void)
>> > +{
>> > +    int ret;
>> > +    int bios_size;
>> > +    ram_addr_t bios_offset;
>> > +    char *filename;
>> > +
>> > +    /* BIOS load */
>> > +    if (bios_name == NULL) {
>> > +        bios_name = BIOS_FILENAME;
>> > +    }
>> > +    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
>> > +    if (filename) {
>> > +        bios_size = get_image_size(filename);
>> > +    } else {
>> > +        bios_size = -1;
>> > +    }
>> > +
>> > +    if (bios_size <= 0 || (bios_size % 65536) != 0) {
>> > +        ret = -1;
>> > +    } else {
>> > +        bios_offset = qemu_ram_alloc(NULL, "pc.bios", bios_size);
>> > +        ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
>> > +    }
>> > +
>> > +    if (ret != 0) {
>> > +        fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
>> > +        exit(1);
>> > +    }
>> > +
>> > +    if (filename) {
>> > +        qemu_free(filename);
>> > +    }
>> > +
>> > +    pc_isa_bios_init(bios_offset, bios_size);
>> > +
>> > +    /* map all the bios at the top of memory */
>> > +    cpu_register_physical_memory((uint32_t)(-bios_size),
>> > +                                 bios_size, bios_offset | IO_MEM_ROM);
>> > +
>> > +    return bios_size;
>> > +}
>> > +
>> > +static void pc_system_flash_init(DriveInfo *pflash_drv, int rom_size)
>> > +{
>> > +    BlockDriverState *bdrv;
>> > +    int64_t size;
>> > +    target_phys_addr_t phys_addr;
>> > +    ram_addr_t addr;
>> > +    int sector_bits, sector_size;
>> > +
>> > +    bdrv = NULL;
>> > +
>> > +    bdrv = pflash_drv->bdrv;
>> > +    size = bdrv_getlength(pflash_drv->bdrv);
>> > +    sector_bits = 12;
>> > +    sector_size = 1 << sector_bits;
>> > +
>> > +    if ((size % sector_size) != 0) {
>> > +        fprintf(stderr,
>> > +                "qemu: -pflash size must be a multiple of 0x%x\n",
>> > +                sector_size);
>> > +        exit(1);
>> > +    }
>> > +
>> > +    phys_addr = 0x100000000ULL - rom_size - size;
>> > +    addr = qemu_ram_alloc(NULL, "system.flash", size);
>> > +    DPRINTF("flash addr: 0x%lx\n", (int64_t)phys_addr);
>> > +    pflash_cfi01_register(phys_addr, addr, bdrv,
>> > +                          sector_size, size >> sector_bits,
>> > +                          4, 0x0000, 0x0000, 0x0000, 0x0000, 0);
>> > +
>> > +    if (rom_size == 0) {
>> > +        pc_isa_bios_init(addr, size);
>> > +    }
>> > +}
>> > +
>> > +static void pc_system_firmware_init(void)
>> > +{
>> > +    int flash_present, rom_present;
>> > +    int rom_size;
>> > +    DriveInfo *pflash_drv;
>> > +
>> > +    pflash_drv = drive_get(IF_PFLASH, 0, 0);
>> > +    flash_present = (pflash_drv != NULL);
>> > +
>> > +    /* Load rom if -bios is used or if -pflash is not used */
>> > +    rom_present = ((bios_name != NULL) || !flash_present);
>> > +
>> > +    /* If rom is present, then it is mapped just below 4GB */
>> > +    if (rom_present) {
>> > +        rom_size = pc_system_rom_init();
>> > +    } else {
>> > +        rom_size = 0;
>> > +    }
>> > +
>> > +    /* If flash is present, then it is mapped just below the rom, or
>> > +     * just below 4GB when rom is not present. */
>> > +    if (flash_present) {
>> > +        pc_system_flash_init(pflash_drv, rom_size);
>> > +    }
>> > +}
>> > +
>> >  void pc_memory_init(ram_addr_t ram_size,
>> >                      const char *kernel_filename,
>> >                      const char *kernel_cmdline,
>> > @@ -964,11 +1083,9 @@ void pc_memory_init(ram_addr_t ram_size,
>> >                      ram_addr_t *below_4g_mem_size_p,
>> >                      ram_addr_t *above_4g_mem_size_p)
>> >  {
>> > -    char *filename;
>> > -    int ret, linux_boot, i;
>> > -    ram_addr_t ram_addr, bios_offset, option_rom_offset;
>> > +    int linux_boot, i;
>> > +    ram_addr_t ram_addr, option_rom_offset;
>> >      ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
>> > -    int bios_size, isa_bios_size;
>> >      void *fw_cfg;
>> >
>> >      if (ram_size >= 0xe0000000 ) {
>> > @@ -994,44 +1111,12 @@ void pc_memory_init(ram_addr_t ram_size,
>> >                                       ram_addr + below_4g_mem_size);
>> >      }
>> >
>> > -    /* BIOS load */
>> > -    if (bios_name == NULL)
>> > -        bios_name = BIOS_FILENAME;
>> > -    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
>> > -    if (filename) {
>> > -        bios_size = get_image_size(filename);
>> > -    } else {
>> > -        bios_size = -1;
>> > -    }
>> > -    if (bios_size <= 0 ||
>> > -        (bios_size % 65536) != 0) {
>> > -        goto bios_error;
>> > -    }
>> > -    bios_offset = qemu_ram_alloc(NULL, "pc.bios", bios_size);
>> > -    ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
>> > -    if (ret != 0) {
>> > -    bios_error:
>> > -        fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
>> > -        exit(1);
>> > -    }
>> > -    if (filename) {
>> > -        qemu_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;
>> > -    cpu_register_physical_memory(0x100000 - isa_bios_size,
>> > -                                 isa_bios_size,
>> > -                                 (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
>> > +    /* Initialize ROM or flash ranges for PC firmware */
>> > +    pc_system_firmware_init();
>> >
>> >      option_rom_offset = qemu_ram_alloc(NULL, "pc.rom", PC_ROM_SIZE);
>> >      cpu_register_physical_memory(PC_ROM_MIN_VGA, PC_ROM_SIZE, option_rom_offset);
>> >
>> > -    /* map all the bios at the top of memory */
>> > -    cpu_register_physical_memory((uint32_t)(-bios_size),
>> > -                                 bios_size, bios_offset | IO_MEM_ROM);
>> > -
>> >      fw_cfg = bochs_bios_init();
>> >      rom_set_fw(fw_cfg);
>> >
>> > --
>> > 1.7.1
>> >
>> >
>> >
>>
>> --
>> Aurelien Jarno                          GPG: 1024D/F1BCDB73
>> aurelien@aurel32.net                 http://www.aurel32.net
>>
>>
>
> --
> Aurelien Jarno                          GPG: 1024D/F1BCDB73
> aurelien@aurel32.net                 http://www.aurel32.net
>
>