a3e3d9c198
Update STM32F469-disco configuration files to operate with new kernel.
Result of make tinyconfig was taken as a starting point to fit kernel
into flash memory.
Current setup kernel + rootfs fits in 1.6MB on-chip flash memory
Fixes:
- Move kernel to new flash bank due to growth of dtb size
- Fix kernel start address in bootloader
- Remove outdated path which doesn't affect normal operation mode
For better binary size optimization gcc LTO is turned on.
Signed-off-by: Yauheni Saldatsenka <eugentoo@gmail.com>
[Arnout:
- squash 3 patches into 1;
- remove unused dts file;
- move linux/linux.config to linux-xip.config;
- add a sentence to readme to say SD card is not needed.
]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
57 lines
1.5 KiB
Diff
57 lines
1.5 KiB
Diff
From fe5f3a86d07e378baeeddc1dfecd0686d83aa42f Mon Sep 17 00:00:00 2001
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From: Yauheni Saldatsenka <eugentoo@gmail.com>
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Date: Sat, 14 Aug 2021 18:54:51 +0300
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Subject: [PATCH] stm32f469-i: Update kernel start address
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As of GNU/Linux v5.12 kernel device tree binary grows above 0x08008000
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and overwrites kernel binary
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Therefore this commit moves kernel to the next flash bank
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Signed-off-by: Yauheni Saldatsenka <eugentoo@gmail.com>
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---
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stm32f469i-disco.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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diff --git a/stm32f469i-disco.c b/stm32f469i-disco.c
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index 2da1f4b..46fc06a 100644
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--- a/stm32f469i-disco.c
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+++ b/stm32f469i-disco.c
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@@ -6,6 +6,7 @@
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#include "gpio.h"
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#include "mpu.h"
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+#define KERNEL_ADDR 0x08010000
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#define CONFIG_HSE_HZ 8000000
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#define CONFIG_PLL_M 8
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#define CONFIG_PLL_N 360
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@@ -85,7 +86,7 @@ static void fmc_wait_busy(void)
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void start_kernel(void)
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{
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- void (*kernel)(uint32_t reserved, uint32_t mach, uint32_t dt) = (void (*)(uint32_t, uint32_t, uint32_t))(0x08008000 | 1);
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+ void (*kernel)(uint32_t reserved, uint32_t mach, uint32_t dt) = (void (*)(uint32_t, uint32_t, uint32_t))(KERNEL_ADDR | 1);
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kernel(0, ~0UL, 0x08004000);
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}
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@@ -102,7 +103,7 @@ int main(void)
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volatile uint32_t *SYSCFG_MEMRMP = (void *)(SYSCFG_BASE + 0x00);
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int i;
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- mpu_config(0x0);
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+ mpu_config(0xc0000000);
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if (*FLASH_CR & FLASH_CR_LOCK) {
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*FLASH_KEYR = 0x45670123;
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@@ -195,8 +196,6 @@ int main(void)
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usart_setup(usart_base, 45000000);
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usart_putch(usart_base, '.');
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- *SYSCFG_MEMRMP = 0x4;
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-
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start_kernel();
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return 0;
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--
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2.32.0
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