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@@ -1,316 +0,0 @@
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-/* btfixup.c: Boot time code fixup and relocator, so that
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- * we can get rid of most indirect calls to achieve single
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- * image sun4c and srmmu kernel.
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- *
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- * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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- */
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-
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-#include <linux/kernel.h>
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-#include <linux/init.h>
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-#include <asm/btfixup.h>
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-#include <asm/page.h>
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-#include <asm/pgalloc.h>
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-#include <asm/pgtable.h>
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-#include <asm/oplib.h>
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-#include <asm/cacheflush.h>
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-
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-#define BTFIXUP_OPTIMIZE_NOP
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-#define BTFIXUP_OPTIMIZE_OTHER
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-
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-extern char *srmmu_name;
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-static char version[] __initdata = "Boot time fixup v1.6. 4/Mar/98 Jakub Jelinek (jj@ultra.linux.cz). Patching kernel for ";
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-static char str_srmmu[] __initdata = "srmmu[%s]/";
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-static char str_iommu[] __initdata = "iommu\n";
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-static char str_iounit[] __initdata = "io-unit\n";
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-
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-static int visited __initdata = 0;
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-extern unsigned int ___btfixup_start[], ___btfixup_end[], __init_begin[], __init_end[], __init_text_end[];
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-extern unsigned int _stext[], _end[], __start___ksymtab[], __stop___ksymtab[];
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-static char wrong_f[] __initdata = "Trying to set f fixup %p to invalid function %08x\n";
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-static char wrong_b[] __initdata = "Trying to set b fixup %p to invalid function %08x\n";
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-static char wrong_s[] __initdata = "Trying to set s fixup %p to invalid value %08x\n";
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-static char wrong_h[] __initdata = "Trying to set h fixup %p to invalid value %08x\n";
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-static char wrong_a[] __initdata = "Trying to set a fixup %p to invalid value %08x\n";
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-static char wrong[] __initdata = "Wrong address for %c fixup %p\n";
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-static char insn_f[] __initdata = "Fixup f %p refers to weird instructions at %p[%08x,%08x]\n";
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-static char insn_b[] __initdata = "Fixup b %p doesn't refer to a SETHI at %p[%08x]\n";
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-static char insn_s[] __initdata = "Fixup s %p doesn't refer to an OR at %p[%08x]\n";
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-static char insn_h[] __initdata = "Fixup h %p doesn't refer to a SETHI at %p[%08x]\n";
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-static char insn_a[] __initdata = "Fixup a %p doesn't refer to a SETHI nor OR at %p[%08x]\n";
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-static char insn_i[] __initdata = "Fixup i %p doesn't refer to a valid instruction at %p[%08x]\n";
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-static char wrong_setaddr[] __initdata = "Garbled CALL/INT patch at %p[%08x,%08x,%08x]=%08x\n";
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-
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-#ifdef BTFIXUP_OPTIMIZE_OTHER
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-static void __init set_addr(unsigned int *addr, unsigned int q1, int fmangled, unsigned int value)
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-{
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- if (!fmangled)
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- *addr = value;
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- else {
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- unsigned int *q = (unsigned int *)q1;
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- if (*addr == 0x01000000) {
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- /* Noped */
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- *q = value;
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- } else if (addr[-1] == *q) {
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- /* Moved */
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- addr[-1] = value;
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- *q = value;
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- } else {
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- prom_printf(wrong_setaddr, addr-1, addr[-1], *addr, *q, value);
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- prom_halt();
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- }
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- }
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-}
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-#else
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-static inline void set_addr(unsigned int *addr, unsigned int q1, int fmangled, unsigned int value)
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-{
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- *addr = value;
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-}
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-#endif
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-
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-void __init btfixup(void)
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-{
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- unsigned int *p, *q;
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- int type, count;
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- unsigned insn;
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- unsigned *addr;
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- int fmangled = 0;
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-
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- if (!visited) {
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- visited++;
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- printk(version);
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- printk(str_srmmu, srmmu_name);
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- if (sparc_cpu_model == sun4d)
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- printk(str_iounit);
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- else
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- printk(str_iommu);
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- }
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- for (p = ___btfixup_start; p < ___btfixup_end; ) {
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- count = p[2];
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- q = p + 3;
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- switch (type = *(unsigned char *)p) {
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- case 'f':
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- count = p[3];
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- q = p + 4;
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- if (((p[0] & 1) || p[1])
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- && ((p[1] & 3) || (unsigned *)(p[1]) < _stext || (unsigned *)(p[1]) >= _end)) {
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- prom_printf(wrong_f, p, p[1]);
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- prom_halt();
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- }
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- break;
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- case 'b':
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- if (p[1] < (unsigned long)__init_begin || p[1] >= (unsigned long)__init_text_end || (p[1] & 3)) {
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- prom_printf(wrong_b, p, p[1]);
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- prom_halt();
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- }
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- break;
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- case 's':
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- if (p[1] + 0x1000 >= 0x2000) {
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- prom_printf(wrong_s, p, p[1]);
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- prom_halt();
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- }
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- break;
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- case 'h':
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- if (p[1] & 0x3ff) {
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- prom_printf(wrong_h, p, p[1]);
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- prom_halt();
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- }
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- break;
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- case 'a':
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- if (p[1] + 0x1000 >= 0x2000 && (p[1] & 0x3ff)) {
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- prom_printf(wrong_a, p, p[1]);
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- prom_halt();
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- }
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- break;
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- }
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- if (p[0] & 1) {
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- p[0] &= ~1;
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- while (count) {
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- fmangled = 0;
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- addr = (unsigned *)*q;
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- if (addr < _stext || addr >= _end) {
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- prom_printf(wrong, type, p);
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- prom_halt();
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- }
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- insn = *addr;
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-#ifdef BTFIXUP_OPTIMIZE_OTHER
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- if (type != 'f' && q[1]) {
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- insn = *(unsigned int *)q[1];
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- if (!insn || insn == 1)
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- insn = *addr;
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- else
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- fmangled = 1;
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- }
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-#endif
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- switch (type) {
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- case 'f': /* CALL */
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- if (addr >= __start___ksymtab && addr < __stop___ksymtab) {
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- *addr = p[1];
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- break;
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- } else if (!q[1]) {
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- if ((insn & 0xc1c00000) == 0x01000000) { /* SETHI */
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- *addr = (insn & 0xffc00000) | (p[1] >> 10); break;
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- } else if ((insn & 0xc1f82000) == 0x80102000) { /* OR X, %LO(i), Y */
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- *addr = (insn & 0xffffe000) | (p[1] & 0x3ff); break;
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- } else if ((insn & 0xc0000000) != 0x40000000) { /* !CALL */
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- bad_f:
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- prom_printf(insn_f, p, addr, insn, addr[1]);
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- prom_halt();
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- }
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- } else if (q[1] != 1)
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- addr[1] = q[1];
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- if (p[2] == BTFIXUPCALL_NORM) {
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- norm_f:
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- *addr = 0x40000000 | ((p[1] - (unsigned)addr) >> 2);
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- q[1] = 0;
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- break;
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- }
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-#ifndef BTFIXUP_OPTIMIZE_NOP
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- goto norm_f;
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-#else
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- if (!(addr[1] & 0x80000000)) {
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- if ((addr[1] & 0xc1c00000) != 0x01000000) /* !SETHI */
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- goto bad_f; /* CALL, Bicc, FBfcc, CBccc are weird in delay slot, aren't they? */
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- } else {
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- if ((addr[1] & 0x01800000) == 0x01800000) {
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- if ((addr[1] & 0x01f80000) == 0x01e80000) {
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- /* RESTORE */
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- goto norm_f; /* It is dangerous to patch that */
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- }
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- goto bad_f;
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- }
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- if ((addr[1] & 0xffffe003) == 0x9e03e000) {
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- /* ADD %O7, XX, %o7 */
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- int displac = (addr[1] << 19);
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-
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- displac = (displac >> 21) + 2;
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- *addr = (0x10800000) + (displac & 0x3fffff);
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- q[1] = addr[1];
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- addr[1] = p[2];
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- break;
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- }
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- if ((addr[1] & 0x201f) == 0x200f || (addr[1] & 0x7c000) == 0x3c000)
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- goto norm_f; /* Someone is playing bad tricks with us: rs1 or rs2 is o7 */
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- if ((addr[1] & 0x3e000000) == 0x1e000000)
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- goto norm_f; /* rd is %o7. We'd better take care. */
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- }
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- if (p[2] == BTFIXUPCALL_NOP) {
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- *addr = 0x01000000;
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- q[1] = 1;
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- break;
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- }
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-#ifndef BTFIXUP_OPTIMIZE_OTHER
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- goto norm_f;
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-#else
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- if (addr[1] == 0x01000000) { /* NOP in the delay slot */
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- q[1] = addr[1];
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- *addr = p[2];
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- break;
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- }
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- if ((addr[1] & 0xc0000000) != 0xc0000000) {
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- /* Not a memory operation */
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- if ((addr[1] & 0x30000000) == 0x10000000) {
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- /* Ok, non-memory op with rd %oX */
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- if ((addr[1] & 0x3e000000) == 0x1c000000)
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- goto bad_f; /* Aiee. Someone is playing strange %sp tricks */
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- if ((addr[1] & 0x3e000000) > 0x12000000 ||
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- ((addr[1] & 0x3e000000) == 0x12000000 &&
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- p[2] != BTFIXUPCALL_STO1O0 && p[2] != BTFIXUPCALL_SWAPO0O1) ||
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- ((p[2] & 0xffffe000) == BTFIXUPCALL_RETINT(0))) {
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- /* Nobody uses the result. We can nop it out. */
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- *addr = p[2];
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- q[1] = addr[1];
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- addr[1] = 0x01000000;
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- break;
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- }
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- if ((addr[1] & 0xf1ffffe0) == 0x90100000) {
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- /* MOV %reg, %Ox */
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- if ((addr[1] & 0x3e000000) == 0x10000000 &&
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- (p[2] & 0x7c000) == 0x20000) {
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- /* Ok, it is call xx; mov reg, %o0 and call optimizes
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- to doing something on %o0. Patch the patch. */
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- *addr = (p[2] & ~0x7c000) | ((addr[1] & 0x1f) << 14);
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- q[1] = addr[1];
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- addr[1] = 0x01000000;
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- break;
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- }
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- if ((addr[1] & 0x3e000000) == 0x12000000 &&
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- p[2] == BTFIXUPCALL_STO1O0) {
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- *addr = (p[2] & ~0x3e000000) | ((addr[1] & 0x1f) << 25);
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- q[1] = addr[1];
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- addr[1] = 0x01000000;
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- break;
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- }
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- }
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- }
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- }
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- *addr = addr[1];
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- q[1] = addr[1];
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- addr[1] = p[2];
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- break;
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-#endif /* BTFIXUP_OPTIMIZE_OTHER */
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-#endif /* BTFIXUP_OPTIMIZE_NOP */
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- case 'b': /* BLACKBOX */
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- /* Has to be sethi i, xx */
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- if ((insn & 0xc1c00000) != 0x01000000) {
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- prom_printf(insn_b, p, addr, insn);
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- prom_halt();
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- } else {
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- void (*do_fixup)(unsigned *);
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-
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- do_fixup = (void (*)(unsigned *))p[1];
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- do_fixup(addr);
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- }
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- break;
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- case 's': /* SIMM13 */
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- /* Has to be or %g0, i, xx */
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- if ((insn & 0xc1ffe000) != 0x80102000) {
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- prom_printf(insn_s, p, addr, insn);
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- prom_halt();
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- }
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- set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x1fff));
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- break;
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- case 'h': /* SETHI */
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- /* Has to be sethi i, xx */
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- if ((insn & 0xc1c00000) != 0x01000000) {
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- prom_printf(insn_h, p, addr, insn);
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- prom_halt();
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- }
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- set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
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- break;
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- case 'a': /* HALF */
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- /* Has to be sethi i, xx or or %g0, i, xx */
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- if ((insn & 0xc1c00000) != 0x01000000 &&
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- (insn & 0xc1ffe000) != 0x80102000) {
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- prom_printf(insn_a, p, addr, insn);
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- prom_halt();
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- }
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- if (p[1] & 0x3ff)
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- set_addr(addr, q[1], fmangled,
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- (insn & 0x3e000000) | 0x80102000 | (p[1] & 0x1fff));
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- else
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- set_addr(addr, q[1], fmangled,
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- (insn & 0x3e000000) | 0x01000000 | (p[1] >> 10));
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- break;
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- case 'i': /* INT */
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- if ((insn & 0xc1c00000) == 0x01000000) /* %HI */
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- set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
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- else if ((insn & 0x80002000) == 0x80002000) /* %LO */
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- set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x3ff));
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- else {
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- prom_printf(insn_i, p, addr, insn);
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- prom_halt();
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- }
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- break;
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- }
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- count -= 2;
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- q += 2;
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- }
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- } else
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- p = q + count;
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- }
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-#ifdef CONFIG_SMP
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- local_ops->cache_all();
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-#else
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- sparc32_cachetlb_ops->cache_all();
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-#endif
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-}
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Sam Ravnborg