# HG changeset patch # User tristan.gingold@xxxxxxxx # Node ID e3c8839b28b1e974d33564e5cd642dd28f23a89f # Parent 8364c28cc727be4ebc848b544fe6c85950dd64ce Removed, was unused. Signed-off-by: Tristan Gingold diff -r 8364c28cc727 -r e3c8839b28b1 xen/arch/ia64/linux/patch.c --- a/xen/arch/ia64/linux/patch.c Tue Mar 21 09:22:07 2006 +++ /dev/null Tue Mar 21 09:28:41 2006 @@ -1,189 +0,0 @@ -/* - * Instruction-patching support. - * - * Copyright (C) 2003 Hewlett-Packard Co - * David Mosberger-Tang - */ -#include -#include - -#include -#include -#include -#include -#include - -/* - * This was adapted from code written by Tony Luck: - * - * The 64-bit value in a "movl reg=value" is scattered between the two words of the bundle - * like this: - * - * 6 6 5 4 3 2 1 - * 3210987654321098765432109876543210987654321098765432109876543210 - * ABBBBBBBBBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCCCDEEEEEFFFFFFFFFGGGGGGG - * - * CCCCCCCCCCCCCCCCCCxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx - * xxxxAFFFFFFFFFEEEEEDxGGGGGGGxxxxxxxxxxxxxBBBBBBBBBBBBBBBBBBBBBBB - */ -static u64 -get_imm64 (u64 insn_addr) -{ - u64 *p = (u64 *) (insn_addr & -16); /* mask out slot number */ - - return ( (p[1] & 0x0800000000000000UL) << 4) | /*A*/ - ((p[1] & 0x00000000007fffffUL) << 40) | /*B*/ - ((p[0] & 0xffffc00000000000UL) >> 24) | /*C*/ - ((p[1] & 0x0000100000000000UL) >> 23) | /*D*/ - ((p[1] & 0x0003e00000000000UL) >> 29) | /*E*/ - ((p[1] & 0x07fc000000000000UL) >> 43) | /*F*/ - ((p[1] & 0x000007f000000000UL) >> 36); /*G*/ -} - -/* Patch instruction with "val" where "mask" has 1 bits. */ -void -ia64_patch (u64 insn_addr, u64 mask, u64 val) -{ - u64 m0, m1, v0, v1, b0, b1, *b = (u64 *) (insn_addr & -16); -# define insn_mask ((1UL << 41) - 1) - unsigned long shift; - - b0 = b[0]; b1 = b[1]; - shift = 5 + 41 * (insn_addr % 16); /* 5 bits of template, then 3 x 41-bit instructions */ - if (shift >= 64) { - m1 = mask << (shift - 64); - v1 = val << (shift - 64); - } else { - m0 = mask << shift; m1 = mask >> (64 - shift); - v0 = val << shift; v1 = val >> (64 - shift); - b[0] = (b0 & ~m0) | (v0 & m0); - } - b[1] = (b1 & ~m1) | (v1 & m1); -} - -void -ia64_patch_imm64 (u64 insn_addr, u64 val) -{ - ia64_patch(insn_addr, - 0x01fffefe000UL, ( ((val & 0x8000000000000000UL) >> 27) /* bit 63 -> 36 */ - | ((val & 0x0000000000200000UL) << 0) /* bit 21 -> 21 */ - | ((val & 0x00000000001f0000UL) << 6) /* bit 16 -> 22 */ - | ((val & 0x000000000000ff80UL) << 20) /* bit 7 -> 27 */ - | ((val & 0x000000000000007fUL) << 13) /* bit 0 -> 13 */)); - ia64_patch(insn_addr - 1, 0x1ffffffffffUL, val >> 22); -} - -void -ia64_patch_imm60 (u64 insn_addr, u64 val) -{ - ia64_patch(insn_addr, - 0x011ffffe000UL, ( ((val & 0x0800000000000000UL) >> 23) /* bit 59 -> 36 */ - | ((val & 0x00000000000fffffUL) << 13) /* bit 0 -> 13 */)); - ia64_patch(insn_addr - 1, 0x1fffffffffcUL, val >> 18); -} - -/* - * We need sometimes to load the physical address of a kernel - * object. Often we can convert the virtual address to physical - * at execution time, but sometimes (either for performance reasons - * or during error recovery) we cannot to this. Patch the marked - * bundles to load the physical address. - */ -void __init -ia64_patch_vtop (unsigned long start, unsigned long end) -{ - s32 *offp = (s32 *) start; - u64 ip; - - while (offp < (s32 *) end) { - ip = (u64) offp + *offp; - - /* replace virtual address with corresponding physical address: */ - ia64_patch_imm64(ip, ia64_tpa(get_imm64(ip))); - ia64_fc((void *) ip); - ++offp; - } - ia64_sync_i(); - ia64_srlz_i(); -} - -void -ia64_patch_mckinley_e9 (unsigned long start, unsigned long end) -{ - static int first_time = 1; - int need_workaround; - s32 *offp = (s32 *) start; - u64 *wp; - - need_workaround = (local_cpu_data->family == 0x1f && local_cpu_data->model == 0); - - if (first_time) { - first_time = 0; - if (need_workaround) - printk(KERN_INFO "Leaving McKinley Errata 9 workaround enabled\n"); - else - printk(KERN_INFO "McKinley Errata 9 workaround not needed; " - "disabling it\n"); - } - if (need_workaround) - return; - - while (offp < (s32 *) end) { - wp = (u64 *) ia64_imva((char *) offp + *offp); - wp[0] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */ - wp[1] = 0x0004000000000200UL; - wp[2] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */ - wp[3] = 0x0084006880000200UL; - ia64_fc(wp); ia64_fc(wp + 2); - ++offp; - } - ia64_sync_i(); - ia64_srlz_i(); -} - -static void -patch_fsyscall_table (unsigned long start, unsigned long end) -{ - extern unsigned long fsyscall_table[NR_syscalls]; - s32 *offp = (s32 *) start; - u64 ip; - - while (offp < (s32 *) end) { - ip = (u64) ia64_imva((char *) offp + *offp); - ia64_patch_imm64(ip, (u64) fsyscall_table); - ia64_fc((void *) ip); - ++offp; - } - ia64_sync_i(); - ia64_srlz_i(); -} - -static void -patch_brl_fsys_bubble_down (unsigned long start, unsigned long end) -{ - extern char fsys_bubble_down[]; - s32 *offp = (s32 *) start; - u64 ip; - - while (offp < (s32 *) end) { - ip = (u64) offp + *offp; - ia64_patch_imm60((u64) ia64_imva((void *) ip), - (u64) (fsys_bubble_down - (ip & -16)) / 16); - ia64_fc((void *) ip); - ++offp; - } - ia64_sync_i(); - ia64_srlz_i(); -} - -void -ia64_patch_gate (void) -{ -# define START(name) ((unsigned long) __start_gate_##name##_patchlist) -# define END(name) ((unsigned long)__end_gate_##name##_patchlist) - - patch_fsyscall_table(START(fsyscall), END(fsyscall)); - patch_brl_fsys_bubble_down(START(brl_fsys_bubble_down), END(brl_fsys_bubble_down)); - ia64_patch_vtop(START(vtop), END(vtop)); - ia64_patch_mckinley_e9(START(mckinley_e9), END(mckinley_e9)); -}