diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2012-02-16 09:56:08 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2012-02-17 11:13:21 +0000 |
| commit | aac1e02c1d4b6d02f35a199a454fd46416380ff5 (patch) | |
| tree | 3f6ed80ff0816cbc6a690aecf0b43bf80334cdb1 | |
| parent | 2558e0a67b5573cfd29c9346350ac5d5dc6f866f (diff) | |
hw/vexpress.c: Move secondary CPU boot code to SRAM
On real Versatile Express hardware, the boot ROM puts the secondary
CPU bootcode/holding pen in SRAM. We can therefore rely on Linux not
trashing this memory until secondary CPUs have booted up, and can
put our QEMU-specific pen code in the same place. This allows us to
drop the odd "hack" RAM page we were using before.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | hw/vexpress.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/hw/vexpress.c b/hw/vexpress.c index 38ae05fc8d..6d8eee29c3 100644 --- a/hw/vexpress.c +++ b/hw/vexpress.c @@ -30,13 +30,9 @@ #include "boards.h" #include "exec-memory.h" -#define SMP_BOOT_ADDR 0xe0000000 - #define VEXPRESS_BOARD_ID 0x8e0 -static struct arm_boot_info vexpress_binfo = { - .smp_loader_start = SMP_BOOT_ADDR, -}; +static struct arm_boot_info vexpress_binfo; /* Address maps for peripherals: * the Versatile Express motherboard has two possible maps, @@ -118,7 +114,6 @@ static void vexpress_a9_init(ram_addr_t ram_size, MemoryRegion *lowram = g_new(MemoryRegion, 1); MemoryRegion *vram = g_new(MemoryRegion, 1); MemoryRegion *sram = g_new(MemoryRegion, 1); - MemoryRegion *hackram = g_new(MemoryRegion, 1); DeviceState *dev, *sysctl, *pl041; SysBusDevice *busdev; qemu_irq *irqp; @@ -275,14 +270,6 @@ static void vexpress_a9_init(ram_addr_t ram_size, /* VE_DAPROM: not modelled */ - /* ??? Hack to map an additional page of ram for the secondary CPU - startup code. I guess this works on real hardware because the - BootROM happens to be in ROM/flash or in memory that isn't clobbered - until after Linux boots the secondary CPUs. */ - memory_region_init_ram(hackram, "vexpress.hack", 0x1000); - vmstate_register_ram_global(hackram); - memory_region_add_subregion(sysmem, SMP_BOOT_ADDR, hackram); - vexpress_binfo.ram_size = ram_size; vexpress_binfo.kernel_filename = kernel_filename; vexpress_binfo.kernel_cmdline = kernel_cmdline; @@ -290,6 +277,7 @@ static void vexpress_a9_init(ram_addr_t ram_size, vexpress_binfo.nb_cpus = smp_cpus; vexpress_binfo.board_id = VEXPRESS_BOARD_ID; vexpress_binfo.loader_start = 0x60000000; + vexpress_binfo.smp_loader_start = map[VE_SRAM]; vexpress_binfo.smp_bootreg_addr = map[VE_SYSREGS] + 0x30; arm_load_kernel(first_cpu, &vexpress_binfo); } |