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update bootloader memory allocation

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This commit is contained in:
wuzhenghui
2022-07-01 12:06:00 +08:00
parent f8729d905e
commit d8432af3ab
2 changed files with 62 additions and 10 deletions
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36
components/bootloader/subproject/main/ld/esp32c3/bootloader.ld
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@@ -1,14 +1,40 @@
/** Simplified memory map for the bootloader.
* Make sure the bootloader can load into main memory without overwriting itself.
* We put 2nd bootloader in the high address space (before ROM stack/data/bss).
* See memory usage for ROM bootloader at the end of this file.
*
* ESP32-C3 ROM static data usage is as follows:
* - 0x3fccae00 - 0x3fcdc710: Shared buffers, used in UART/USB/SPI download mode only
* - 0x3fcdc710 - 0x3fcde710: APP CPU stack, can be reclaimed as heap after RTOS startup
* - 0x3fcde710 - 0x3fce0000: ROM .bss and .data (not easily reclaimable)
*
* The 2nd stage bootloader can take space up to the end of ROM shared
* buffers area (0x3fcdc710).
*/
/* The offset between Dbus and Ibus. Used to convert between 0x403xxxxx and 0x3fcxxxxx addresses. */
iram_dram_offset = 0x700000;
/* We consider 0x3fcdc710 to be the last usable address for 2nd stage bootloader stack overhead, dram_seg,
* and work out iram_seg and iram_loader_seg addresses from there, backwards.
*/
/* These lengths can be adjusted, if necessary: */
bootloader_usable_dram_end = 0x3fcdc710;
bootloader_stack_overhead = 0x2000; /* For safety margin between bootloader data section and startup stacks */
bootloader_dram_seg_len = 0x5000;
bootloader_iram_loader_seg_len = 0x7000;
bootloader_iram_seg_len = 0x2000;
/* Start of the lower region is determined by region size and the end of the higher region */
bootloader_dram_seg_end = bootloader_usable_dram_end - bootloader_stack_overhead;
bootloader_dram_seg_start = bootloader_dram_seg_end - bootloader_dram_seg_len;
bootloader_iram_loader_seg_start = bootloader_dram_seg_start - bootloader_iram_loader_seg_len + iram_dram_offset;
bootloader_iram_seg_start = bootloader_iram_loader_seg_start - bootloader_iram_seg_len;
MEMORY
{
iram_seg (RWX) : org = 0x403CE000, len = 0x2000
iram_loader_seg (RWX) : org = 0x403D0000, len = 0x6000
dram_seg (RW) : org = 0x3FCD6000, len = 0x4000
iram_seg (RWX) : org = bootloader_iram_seg_start, len = bootloader_iram_seg_len
iram_loader_seg (RWX) : org = bootloader_iram_loader_seg_start, len = bootloader_iram_loader_seg_len
dram_seg (RW) : org = bootloader_dram_seg_start, len = bootloader_dram_seg_len
}
/* Default entry point: */

36
components/bootloader/subproject/main/ld/esp32h2/bootloader.ld
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@@ -1,14 +1,40 @@
/** Simplified memory map for the bootloader.
* Make sure the bootloader can load into main memory without overwriting itself.
* We put 2nd bootloader in the high address space (before ROM stack/data/bss).
* See memory usage for ROM bootloader at the end of this file.
*
* ESP32-H2 ROM static data usage is as follows:
* - 0x3fccb900 - 0x3fcdd210: Shared buffers, used in UART/USB/SPI download mode only
* - 0x3fcdd210 - 0x3fcdf210: APP CPU stack, can be reclaimed as heap after RTOS startup
* - 0x3fcdf210 - 0x3fce0000: ROM .bss and .data (not easily reclaimable)
*
* The 2nd stage bootloader can take space up to the end of ROM shared
* buffers area (0x3fce9704). For alignment purpose we shall use value (0x3fce9700).
*/
/* The offset between Dbus and Ibus. Used to convert between 0x403xxxxx and 0x3fcxxxxx addresses. */
iram_dram_offset = 0x700000;
/* We consider 0x3fce9700 to be the last usable address for 2nd stage bootloader stack overhead, dram_seg,
* and work out iram_seg and iram_loader_seg addresses from there, backwards.
*/
/* These lengths can be adjusted, if necessary: */
bootloader_usable_dram_end = 0x3fcdd120;
bootloader_stack_overhead = 0x2000; /* For safety margin between bootloader data section and startup stacks */
bootloader_dram_seg_len = 0x5000;
bootloader_iram_loader_seg_len = 0x7000;
bootloader_iram_seg_len = 0x2000;
/* Start of the lower region is determined by region size and the end of the higher region */
bootloader_dram_seg_end = bootloader_usable_dram_end - bootloader_stack_overhead;
bootloader_dram_seg_start = bootloader_dram_seg_end - bootloader_dram_seg_len;
bootloader_iram_loader_seg_start = bootloader_dram_seg_start - bootloader_iram_loader_seg_len + iram_dram_offset;
bootloader_iram_seg_start = bootloader_iram_loader_seg_start - bootloader_iram_seg_len;
MEMORY
{
iram_seg (RWX) : org = 0x403CE000, len = 0x2000
iram_loader_seg (RWX) : org = 0x403D0000, len = 0x6000
dram_seg (RW) : org = 0x3FCD6000, len = 0x4000
iram_seg (RWX) : org = bootloader_iram_seg_start, len = bootloader_iram_seg_len
iram_loader_seg (RWX) : org = bootloader_iram_loader_seg_start, len = bootloader_iram_loader_seg_len
dram_seg (RW) : org = bootloader_dram_seg_start, len = bootloader_dram_seg_len
}
/* Default entry point: */