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hw/arm/stm32f405: correctly describe the memory layout

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STM32F405 has 128K of SRAM and another 64K of CCM (Core-coupled
Memory) at a different base address. Correctly describe the memory
layout to give existing FW images a chance to run unmodified.

Reviewed-by: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Message-id: 20221230145733.200496-2-balbi@kernel.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Felipe Balbi 2022-12-30 16:57:32 +02:00 committed by Peter Maydell
parent 3db29dcac2
commit 829da0dbe3
2 changed files with 12 additions and 1 deletions
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8
hw/arm/stm32f405_soc.c
View File

@ -139,6 +139,14 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
}
memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, &s->sram);
memory_region_init_ram(&s->ccm, NULL, "STM32F405.ccm", CCM_SIZE,
&err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(system_memory, CCM_BASE_ADDRESS, &s->ccm);
armv7m = DEVICE(&s->armv7m);
qdev_prop_set_uint32(armv7m, "num-irq", 96);
qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);

5
include/hw/arm/stm32f405_soc.h
View File

@ -46,7 +46,9 @@ OBJECT_DECLARE_SIMPLE_TYPE(STM32F405State, STM32F405_SOC)
#define FLASH_BASE_ADDRESS 0x08000000
#define FLASH_SIZE (1024 * 1024)
#define SRAM_BASE_ADDRESS 0x20000000
#define SRAM_SIZE (192 * 1024)
#define SRAM_SIZE (128 * 1024)
#define CCM_BASE_ADDRESS 0x10000000
#define CCM_SIZE (64 * 1024)
struct STM32F405State {
/*< private >*/
@ -65,6 +67,7 @@ struct STM32F405State {
STM32F2XXADCState adc[STM_NUM_ADCS];
STM32F2XXSPIState spi[STM_NUM_SPIS];
MemoryRegion ccm;
MemoryRegion sram;
MemoryRegion flash;
MemoryRegion flash_alias;