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hw/riscv: opentitan: Add the flash alias

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OpenTitan has an alias of flash avaliable which is called virtual flash.
Add support for that in the QEMU model.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: c9cfbd2dd840fd0076877b8ea4d6dcfce60db5e9.1625801868.git.alistair.francis@wdc.com
This commit is contained in:
Alistair Francis 2021-07-09 13:38:48 +10:00
parent 5ee257649f
commit bb7e0cde3c
2 changed files with 8 additions and 0 deletions
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6
hw/riscv/opentitan.c
View File

@ -59,6 +59,7 @@ static const MemMapEntry ibex_memmap[] = {
[IBEX_DEV_NMI_GEN] = { 0x411c0000, 0x1000 },
[IBEX_DEV_OTBN] = { 0x411d0000, 0x10000 },
[IBEX_DEV_PERI] = { 0x411f0000, 0x10000 },
[IBEX_DEV_FLASH_VIRTUAL] = { 0x80000000, 0x80000 },
};
static void opentitan_board_init(MachineState *machine)
@ -134,8 +135,13 @@ static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
/* Flash memory */
memory_region_init_rom(&s->flash_mem, OBJECT(dev_soc), "riscv.lowrisc.ibex.flash",
memmap[IBEX_DEV_FLASH].size, &error_fatal);
memory_region_init_alias(&s->flash_alias, OBJECT(dev_soc),
"riscv.lowrisc.ibex.flash_virtual", &s->flash_mem, 0,
memmap[IBEX_DEV_FLASH_VIRTUAL].size);
memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH].base,
&s->flash_mem);
memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH_VIRTUAL].base,
&s->flash_alias);
/* PLIC */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {

2
include/hw/riscv/opentitan.h
View File

@ -40,6 +40,7 @@ struct LowRISCIbexSoCState {
MemoryRegion flash_mem;
MemoryRegion rom;
MemoryRegion flash_alias;
};
typedef struct OpenTitanState {
@ -54,6 +55,7 @@ enum {
IBEX_DEV_ROM,
IBEX_DEV_RAM,
IBEX_DEV_FLASH,
IBEX_DEV_FLASH_VIRTUAL,
IBEX_DEV_UART,
IBEX_DEV_GPIO,
IBEX_DEV_SPI,