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hw/arm/aspeed_ast27x0-fc: Map FMC0 flash contents into CA35 boot ROM

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This patch introduces a dedicated ca35_boot_rom memory region and
copies the FMC0 flash data into it.

The motivation is to support the upcoming vbootrom. The vbootrom
replaces the existing BOOTMCU (RISC-V 32 SPL) flow, which currently reads
the "image-bmc" from FMC_CS0 and loads the following components
into DRAM:

- Trusted Firmware-A
- OP-TEE OS
- u-boot-nodtb.bin
- u-boot.dtb

After loading, BOOTMCU releases the CA35 reset so that CA35 can start
executing Trusted Firmware-A.

The vbootrom follows the same sequence: CA35 fetches "image-bmc" from FMC0
flash at the SPI boot ROM base address (0x100000000), parses the FIT image,
loads each component into its designated DRAM location, and then jumps to
Trusted Firmware-A.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251015062210.3128710-8-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Jamin Lin 2025-10-15 14:22:02 +08:00 • committed by Cédric Le Goater
parent 10e377246d
commit 71c01f5787
1 changed files with 12 additions and 2 deletions
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14
hw/arm/aspeed_ast27x0-fc.c
View file

@ -35,6 +35,7 @@ struct Ast2700FCState {
MemoryRegion ca35_memory;
MemoryRegion ca35_dram;
MemoryRegion ca35_boot_rom;
MemoryRegion ssp_memory;
MemoryRegion tsp_memory;
@ -44,8 +45,6 @@ struct Ast2700FCState {
Aspeed27x0SoCState ca35;
Aspeed27x0CoprocessorState ssp;
Aspeed27x0CoprocessorState tsp;
bool mmio_exec;
};
#define AST2700FC_BMC_RAM_SIZE (1 * GiB)
@ -61,6 +60,9 @@ static bool ast2700fc_ca35_init(MachineState *machine, Error **errp)
Ast2700FCState *s = AST2700A1FC(machine);
AspeedSoCState *soc;
AspeedSoCClass *sc;
BlockBackend *fmc0 = NULL;
DeviceState *dev = NULL;
uint64_t rom_size;
object_initialize_child(OBJECT(s), "ca35", &s->ca35, "ast2700-a1");
soc = ASPEED_SOC(&s->ca35);
@ -112,6 +114,14 @@ static bool ast2700fc_ca35_init(MachineState *machine, Error **errp)
ast2700fc_board_info.ram_size = machine->ram_size;
ast2700fc_board_info.loader_start = sc->memmap[ASPEED_DEV_SDRAM];
dev = ssi_get_cs(soc->fmc.spi, 0);
fmc0 = dev ? m25p80_get_blk(dev) : NULL;
if (fmc0) {
rom_size = memory_region_size(&soc->spi_boot);
aspeed_install_boot_rom(soc, fmc0, &s->ca35_boot_rom, rom_size);
}
arm_load_kernel(ARM_CPU(first_cpu), machine, &ast2700fc_board_info);
return true;