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-rw-r--r--arch/sparc/mm/btfixup.c328
1 files changed, 0 insertions, 328 deletions
diff --git a/arch/sparc/mm/btfixup.c b/arch/sparc/mm/btfixup.c
deleted file mode 100644
index 09d6af22db2d..000000000000
--- a/arch/sparc/mm/btfixup.c
+++ /dev/null
@@ -1,328 +0,0 @@
-/* btfixup.c: Boot time code fixup and relocator, so that
- * we can get rid of most indirect calls to achieve single
- * image sun4c and srmmu kernel.
- *
- * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <asm/btfixup.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
-#include <asm/oplib.h>
-#include <asm/cacheflush.h>
-
-#define BTFIXUP_OPTIMIZE_NOP
-#define BTFIXUP_OPTIMIZE_OTHER
-
-extern char *srmmu_name;
-static char version[] __initdata = "Boot time fixup v1.6. 4/Mar/98 Jakub Jelinek (jj@ultra.linux.cz). Patching kernel for ";
-static char str_sun4c[] __initdata = "sun4c\n";
-static char str_srmmu[] __initdata = "srmmu[%s]/";
-static char str_iommu[] __initdata = "iommu\n";
-static char str_iounit[] __initdata = "io-unit\n";
-
-static int visited __initdata = 0;
-extern unsigned int ___btfixup_start[], ___btfixup_end[], __init_begin[], __init_end[], __init_text_end[];
-extern unsigned int _stext[], _end[], __start___ksymtab[], __stop___ksymtab[];
-static char wrong_f[] __initdata = "Trying to set f fixup %p to invalid function %08x\n";
-static char wrong_b[] __initdata = "Trying to set b fixup %p to invalid function %08x\n";
-static char wrong_s[] __initdata = "Trying to set s fixup %p to invalid value %08x\n";
-static char wrong_h[] __initdata = "Trying to set h fixup %p to invalid value %08x\n";
-static char wrong_a[] __initdata = "Trying to set a fixup %p to invalid value %08x\n";
-static char wrong[] __initdata = "Wrong address for %c fixup %p\n";
-static char insn_f[] __initdata = "Fixup f %p refers to weird instructions at %p[%08x,%08x]\n";
-static char insn_b[] __initdata = "Fixup b %p doesn't refer to a SETHI at %p[%08x]\n";
-static char insn_s[] __initdata = "Fixup s %p doesn't refer to an OR at %p[%08x]\n";
-static char insn_h[] __initdata = "Fixup h %p doesn't refer to a SETHI at %p[%08x]\n";
-static char insn_a[] __initdata = "Fixup a %p doesn't refer to a SETHI nor OR at %p[%08x]\n";
-static char insn_i[] __initdata = "Fixup i %p doesn't refer to a valid instruction at %p[%08x]\n";
-static char fca_und[] __initdata = "flush_cache_all undefined in btfixup()\n";
-static char wrong_setaddr[] __initdata = "Garbled CALL/INT patch at %p[%08x,%08x,%08x]=%08x\n";
-
-#ifdef BTFIXUP_OPTIMIZE_OTHER
-static void __init set_addr(unsigned int *addr, unsigned int q1, int fmangled, unsigned int value)
-{
- if (!fmangled)
- *addr = value;
- else {
- unsigned int *q = (unsigned int *)q1;
- if (*addr == 0x01000000) {
- /* Noped */
- *q = value;
- } else if (addr[-1] == *q) {
- /* Moved */
- addr[-1] = value;
- *q = value;
- } else {
- prom_printf(wrong_setaddr, addr-1, addr[-1], *addr, *q, value);
- prom_halt();
- }
- }
-}
-#else
-static inline void set_addr(unsigned int *addr, unsigned int q1, int fmangled, unsigned int value)
-{
- *addr = value;
-}
-#endif
-
-void __init btfixup(void)
-{
- unsigned int *p, *q;
- int type, count;
- unsigned insn;
- unsigned *addr;
- int fmangled = 0;
- void (*flush_cacheall)(void);
-
- if (!visited) {
- visited++;
- printk(version);
- if (ARCH_SUN4C)
- printk(str_sun4c);
- else {
- printk(str_srmmu, srmmu_name);
- if (sparc_cpu_model == sun4d)
- printk(str_iounit);
- else
- printk(str_iommu);
- }
- }
- for (p = ___btfixup_start; p < ___btfixup_end; ) {
- count = p[2];
- q = p + 3;
- switch (type = *(unsigned char *)p) {
- case 'f':
- count = p[3];
- q = p + 4;
- if (((p[0] & 1) || p[1])
- && ((p[1] & 3) || (unsigned *)(p[1]) < _stext || (unsigned *)(p[1]) >= _end)) {
- prom_printf(wrong_f, p, p[1]);
- prom_halt();
- }
- break;
- case 'b':
- if (p[1] < (unsigned long)__init_begin || p[1] >= (unsigned long)__init_text_end || (p[1] & 3)) {
- prom_printf(wrong_b, p, p[1]);
- prom_halt();
- }
- break;
- case 's':
- if (p[1] + 0x1000 >= 0x2000) {
- prom_printf(wrong_s, p, p[1]);
- prom_halt();
- }
- break;
- case 'h':
- if (p[1] & 0x3ff) {
- prom_printf(wrong_h, p, p[1]);
- prom_halt();
- }
- break;
- case 'a':
- if (p[1] + 0x1000 >= 0x2000 && (p[1] & 0x3ff)) {
- prom_printf(wrong_a, p, p[1]);
- prom_halt();
- }
- break;
- }
- if (p[0] & 1) {
- p[0] &= ~1;
- while (count) {
- fmangled = 0;
- addr = (unsigned *)*q;
- if (addr < _stext || addr >= _end) {
- prom_printf(wrong, type, p);
- prom_halt();
- }
- insn = *addr;
-#ifdef BTFIXUP_OPTIMIZE_OTHER
- if (type != 'f' && q[1]) {
- insn = *(unsigned int *)q[1];
- if (!insn || insn == 1)
- insn = *addr;
- else
- fmangled = 1;
- }
-#endif
- switch (type) {
- case 'f': /* CALL */
- if (addr >= __start___ksymtab && addr < __stop___ksymtab) {
- *addr = p[1];
- break;
- } else if (!q[1]) {
- if ((insn & 0xc1c00000) == 0x01000000) { /* SETHI */
- *addr = (insn & 0xffc00000) | (p[1] >> 10); break;
- } else if ((insn & 0xc1f82000) == 0x80102000) { /* OR X, %LO(i), Y */
- *addr = (insn & 0xffffe000) | (p[1] & 0x3ff); break;
- } else if ((insn & 0xc0000000) != 0x40000000) { /* !CALL */
- bad_f:
- prom_printf(insn_f, p, addr, insn, addr[1]);
- prom_halt();
- }
- } else if (q[1] != 1)
- addr[1] = q[1];
- if (p[2] == BTFIXUPCALL_NORM) {
- norm_f:
- *addr = 0x40000000 | ((p[1] - (unsigned)addr) >> 2);
- q[1] = 0;
- break;
- }
-#ifndef BTFIXUP_OPTIMIZE_NOP
- goto norm_f;
-#else
- if (!(addr[1] & 0x80000000)) {
- if ((addr[1] & 0xc1c00000) != 0x01000000) /* !SETHI */
- goto bad_f; /* CALL, Bicc, FBfcc, CBccc are weird in delay slot, aren't they? */
- } else {
- if ((addr[1] & 0x01800000) == 0x01800000) {
- if ((addr[1] & 0x01f80000) == 0x01e80000) {
- /* RESTORE */
- goto norm_f; /* It is dangerous to patch that */
- }
- goto bad_f;
- }
- if ((addr[1] & 0xffffe003) == 0x9e03e000) {
- /* ADD %O7, XX, %o7 */
- int displac = (addr[1] << 19);
-
- displac = (displac >> 21) + 2;
- *addr = (0x10800000) + (displac & 0x3fffff);
- q[1] = addr[1];
- addr[1] = p[2];
- break;
- }
- if ((addr[1] & 0x201f) == 0x200f || (addr[1] & 0x7c000) == 0x3c000)
- goto norm_f; /* Someone is playing bad tricks with us: rs1 or rs2 is o7 */
- if ((addr[1] & 0x3e000000) == 0x1e000000)
- goto norm_f; /* rd is %o7. We'd better take care. */
- }
- if (p[2] == BTFIXUPCALL_NOP) {
- *addr = 0x01000000;
- q[1] = 1;
- break;
- }
-#ifndef BTFIXUP_OPTIMIZE_OTHER
- goto norm_f;
-#else
- if (addr[1] == 0x01000000) { /* NOP in the delay slot */
- q[1] = addr[1];
- *addr = p[2];
- break;
- }
- if ((addr[1] & 0xc0000000) != 0xc0000000) {
- /* Not a memory operation */
- if ((addr[1] & 0x30000000) == 0x10000000) {
- /* Ok, non-memory op with rd %oX */
- if ((addr[1] & 0x3e000000) == 0x1c000000)
- goto bad_f; /* Aiee. Someone is playing strange %sp tricks */
- if ((addr[1] & 0x3e000000) > 0x12000000 ||
- ((addr[1] & 0x3e000000) == 0x12000000 &&
- p[2] != BTFIXUPCALL_STO1O0 && p[2] != BTFIXUPCALL_SWAPO0O1) ||
- ((p[2] & 0xffffe000) == BTFIXUPCALL_RETINT(0))) {
- /* Nobody uses the result. We can nop it out. */
- *addr = p[2];
- q[1] = addr[1];
- addr[1] = 0x01000000;
- break;
- }
- if ((addr[1] & 0xf1ffffe0) == 0x90100000) {
- /* MOV %reg, %Ox */
- if ((addr[1] & 0x3e000000) == 0x10000000 &&
- (p[2] & 0x7c000) == 0x20000) {
- /* Ok, it is call xx; mov reg, %o0 and call optimizes
- to doing something on %o0. Patch the patch. */
- *addr = (p[2] & ~0x7c000) | ((addr[1] & 0x1f) << 14);
- q[1] = addr[1];
- addr[1] = 0x01000000;
- break;
- }
- if ((addr[1] & 0x3e000000) == 0x12000000 &&
- p[2] == BTFIXUPCALL_STO1O0) {
- *addr = (p[2] & ~0x3e000000) | ((addr[1] & 0x1f) << 25);
- q[1] = addr[1];
- addr[1] = 0x01000000;
- break;
- }
- }
- }
- }
- *addr = addr[1];
- q[1] = addr[1];
- addr[1] = p[2];
- break;
-#endif /* BTFIXUP_OPTIMIZE_OTHER */
-#endif /* BTFIXUP_OPTIMIZE_NOP */
- case 'b': /* BLACKBOX */
- /* Has to be sethi i, xx */
- if ((insn & 0xc1c00000) != 0x01000000) {
- prom_printf(insn_b, p, addr, insn);
- prom_halt();
- } else {
- void (*do_fixup)(unsigned *);
-
- do_fixup = (void (*)(unsigned *))p[1];
- do_fixup(addr);
- }
- break;
- case 's': /* SIMM13 */
- /* Has to be or %g0, i, xx */
- if ((insn & 0xc1ffe000) != 0x80102000) {
- prom_printf(insn_s, p, addr, insn);
- prom_halt();
- }
- set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x1fff));
- break;
- case 'h': /* SETHI */
- /* Has to be sethi i, xx */
- if ((insn & 0xc1c00000) != 0x01000000) {
- prom_printf(insn_h, p, addr, insn);
- prom_halt();
- }
- set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
- break;
- case 'a': /* HALF */
- /* Has to be sethi i, xx or or %g0, i, xx */
- if ((insn & 0xc1c00000) != 0x01000000 &&
- (insn & 0xc1ffe000) != 0x80102000) {
- prom_printf(insn_a, p, addr, insn);
- prom_halt();
- }
- if (p[1] & 0x3ff)
- set_addr(addr, q[1], fmangled,
- (insn & 0x3e000000) | 0x80102000 | (p[1] & 0x1fff));
- else
- set_addr(addr, q[1], fmangled,
- (insn & 0x3e000000) | 0x01000000 | (p[1] >> 10));
- break;
- case 'i': /* INT */
- if ((insn & 0xc1c00000) == 0x01000000) /* %HI */
- set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
- else if ((insn & 0x80002000) == 0x80002000) /* %LO */
- set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x3ff));
- else {
- prom_printf(insn_i, p, addr, insn);
- prom_halt();
- }
- break;
- }
- count -= 2;
- q += 2;
- }
- } else
- p = q + count;
- }
-#ifdef CONFIG_SMP
- flush_cacheall = (void (*)(void))BTFIXUPVAL_CALL(local_flush_cache_all);
-#else
- flush_cacheall = (void (*)(void))BTFIXUPVAL_CALL(flush_cache_all);
-#endif
- if (!flush_cacheall) {
- prom_printf(fca_und);
- prom_halt();
- }
- (*flush_cacheall)();
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.