37 lines
859 B
ArmAsm
37 lines
859 B
ArmAsm
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#include "platform.h"
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/* Thanks to Joshua Grams for this code.
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On PowerPC processors, we must flush the instruction cache manually
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after writing to the code heap.
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Callable from C as
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void flush_icache(void *start, int len)
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This function is called from compiler.c. */
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#ifdef FACTOR_PPC
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/* IN: 3 = start, 4 = len */
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.globl MANGLE(flush_icache)
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MANGLE(flush_icache):
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/* compute number of cache lines to flush */
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add r4,r4,r3
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clrrwi r3,r3,5 /* align addr to next lower cache line boundary */
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sub r4,r4,r3 /* then n_lines = (len + 0x1f) / 0x20 */
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addi r4,r4,0x1f
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srwi. r4,r4,5 /* note '.' suffix */
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beqlr /* if n_lines == 0, just return. */
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mtctr r4 /* flush cache lines */
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0: dcbf 0,r3 /* for each line... */
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sync
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icbi 0,r3
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addi r3,r3,0x20
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bdnz 0b
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sync /* finish up */
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isync
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blr
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#endif
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