57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include <stdint.h>
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#include <stddef.h>
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extern int main(void);
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//define by bootstrap.ld
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extern uint32_t bbss;
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extern uint32_t sbss;
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extern uint32_t bdata_rom;
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extern uint32_t bdata_ram;
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extern uint32_t sdata;
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//
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// section_dump()
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// copy a memory region using symbol information.
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//
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__attribute__((section(".pretext")))
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void section_dump(uint32_t * restrict dest, uint32_t * restrict load, size_t size)
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{
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size_t i;
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i = -1;
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while (++i < size >> 2)
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dest[i] = load[i];
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}
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//
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// section_reset()
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// clear a memory region using symbol information.
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//
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__attribute__((section(".pretext")))
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void section_reset(uint32_t *bsection, size_t size)
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{
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size_t i;
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i = -1;
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while (++i < size >> 2)
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bsection[i] = 0;
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}
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//
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// initialize() - the real add-in entry.
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// We are currently running in the storage memory, so we should
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// load data in RAM and wipe the bss section for initialize static
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// and global variables.
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//
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__attribute__((section(".pretext.entry")))
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int initialize(void)
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{
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int exit;
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section_reset(&bbss, (size_t)&sbss);
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section_dump(&bdata_ram, &bdata_rom, (size_t)&sdata);
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exit = main();
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return (exit);
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}
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