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riscv/virt: Jump to pflash if specified 

If the user supplied pflash to QEMU then change the reset code to jump
to the pflash base address instead of the DRAM base address.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Alistair Francis 2019-10-08 16:32:29 -07:00 committed by Palmer Dabbelt
parent 71eb522c40
commit 2738b3b555
No known key found for this signature in database
GPG Key ID: EF4CA1502CCBAB41
1 changed files with 10 additions and 1 deletions
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11
hw/riscv/virt.c
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@ -443,6 +443,7 @@ static void riscv_virt_board_init(MachineState *machine)
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
char *plic_hart_config;
size_t plic_hart_config_len;
target_ulong start_addr = memmap[VIRT_DRAM].base;
int i;
unsigned int smp_cpus = machine->smp.cpus;
@ -489,6 +490,14 @@ static void riscv_virt_board_init(MachineState *machine)
}
}
if (drive_get(IF_PFLASH, 0, 0)) {
/*
* Pflash was supplied, let's overwrite the address we jump to after
* reset to the base of the flash.
*/
start_addr = virt_memmap[VIRT_FLASH].base;
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
@ -501,7 +510,7 @@ static void riscv_virt_board_init(MachineState *machine)
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[VIRT_DRAM].base, /* start: .dword memmap[VIRT_DRAM].base */
start_addr, /* start: .dword */
0x00000000,
/* dtb: */
};