928c7211ad
Save SP which is closest to the crash location, which simplifies debugging. For serial_dump, write SP just before the dump. For xfdump, save SP in the dump header. This makes xfdump_dump and xfdump_full_dump_and_reset() equivalent for stack debugging.
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
// XFLASH memory layout
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#pragma once
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#include <stdint.h>
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#include "bootapp.h" // for RAMSIZE
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#include "config.h"
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#define XFLASH_SIZE 0x40000ul // size of XFLASH
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#define LANG_OFFSET 0x0 // offset for language data
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#ifndef XFLASH_DUMP
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#define LANG_SIZE XFLASH_SIZE
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#else
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#define DUMP_MAGIC 0x47555255ul
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struct dump_header_t
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{
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// start with a magic value to indicate the presence of a dump, so that clearing
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// a single page is sufficient for resetting the state
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uint32_t magic;
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uint8_t regs_present; // true when the lower segment containing registers is present
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uint8_t crash_reason; // uses values from dump_crash_source
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uint16_t sp; // SP closest to the crash location
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};
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struct dump_data_t
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{
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// contiguous region containing all addressable ranges
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uint8_t regs[RAMSTART];
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uint8_t sram[RAMSIZE];
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};
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struct dump_t
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{
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struct dump_header_t header;
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// data is page aligned (no real space waste, due to the larger
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// alignment required for the whole dump)
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struct dump_data_t __attribute__((aligned(256))) data;
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};
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// dump offset must be aligned to lower 4kb sector boundary
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#define DUMP_OFFSET ((XFLASH_SIZE - sizeof(dump_t)) & ~0xFFFul)
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#define DUMP_SIZE (XFLASH_SIZE - DUMP_OFFSET) // effective dump size area
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#define LANG_SIZE DUMP_OFFSET // available language space
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#endif
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