Hello Kinsley,
Yes, basically:
if you look at page 135 of the reference manual:
https://www.st.com/resource/en/reference_manual/rm0399-stm32h745755-and-stm32h747757-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
SDRAM BANK 1 is at 0xc0000000 (behaving like device memory, not
executable) or remapped at 0x60000000 (behaving like real memory,
executable and cached)
SDRAM BANK 2 is at 0xd0000000 (behaving like device memory, not
executable) or remapped at 0x70000000 (behaving like real memory,
executable and cached)
Because you want SDRAM to behave like real memory, the remap should be
enabled all the time for all boards and the 0x60000000 or 0x70000000
adresses used.
So basically, to be logical and consistant with the documentation and usage:
SDRAM_1 : ORIGIN = 0x60000000, LENGTH =
${STM32H7_MEMORY_SDRAM_1_SIZE:#010x}
SDRAM_2 : ORIGIN = 0x70000000, LENGTH =
${STM32H7_MEMORY_SDRAM_2_SIZE:#010x}
And the demo boards should all be using SDRAM_2 (0x70000000) with REMAP
enabled.
But there is some work todo to clean that up.
Cedric
On 12.07.23 18:12, Karel Gardas wrote:
Hello Kinsley,
you are indeed right. I've not fixed this bit since it also requires
fixes in linker scripts and additional sdram region for sdram2 remap.
E.g. Original Sebastian's code is using SDRAM_1 as a remap of SDRAM_2.
Linker script(s) then are using SDRAM_1 as an executable region (remap
of SDRAM_2). If you fix SDRAM_1 to be real SDRAM_1, then we will need
SDRAM_2_REMAP defined and fix also all SDRAM_1 occurances in linker
scripts and replace those with SDRAM_2_REMAP.
Or that at least how I understand it...
Thanks,
Karel
On 7/12/23 18:00, Kinsey Moore wrote:
According to the documentation in STM reference manuals RM0399 and
RM0433, the standard memory space for SDRAM bank 1 is 0xc0000000 to
0xcfffffff.
---
spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml
b/spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml
index 88dd4e8c91..2b3aacce5d 100644
--- a/spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml
+++ b/spec/build/bsps/arm/stm32h7/linkcmdsmemory.yml
@@ -14,9 +14,9 @@ content: |
SRAM_BACKUP : ORIGIN = 0x38800000, LENGTH =
${STM32H7_MEMORY_SRAM_BACKUP_SIZE:#010x}
PERIPHERAL : ORIGIN = 0x40000000, LENGTH =
${STM32H7_MEMORY_PERIPHERAL_SIZE:#010x}
NOR : ORIGIN = 0x60000000, LENGTH =
${STM32H7_MEMORY_NOR_SIZE:#010x}
- SDRAM_1 : ORIGIN = 0x70000000, LENGTH =
${STM32H7_MEMORY_SDRAM_1_SIZE:#010x}
NAND : ORIGIN = 0x80000000, LENGTH =
${STM32H7_MEMORY_NAND_SIZE:#010x}
QUADSPI : ORIGIN = 0x90000000, LENGTH =
${STM32H7_MEMORY_QUADSPI_SIZE:#010x}
+ SDRAM_1 : ORIGIN = 0xc0000000, LENGTH =
${STM32H7_MEMORY_SDRAM_1_SIZE:#010x}
SDRAM_2 : ORIGIN = 0xd0000000, LENGTH =
${STM32H7_MEMORY_SDRAM_2_SIZE:#010x}
}
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