root / target-s390x / mem_helper.c @ 795ca114
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/*
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* S/390 memory access helper routines
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*
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* Copyright (c) 2009 Ulrich Hecht
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* Copyright (c) 2009 Alexander Graf
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h" |
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#include "helper.h" |
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/*****************************************************************************/
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/* Softmmu support */
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#if !defined(CONFIG_USER_ONLY)
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#include "exec/softmmu_exec.h" |
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#define MMUSUFFIX _mmu
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#define SHIFT 0 |
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#include "exec/softmmu_template.h" |
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#define SHIFT 1 |
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#include "exec/softmmu_template.h" |
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#define SHIFT 2 |
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#include "exec/softmmu_template.h" |
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#define SHIFT 3 |
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#include "exec/softmmu_template.h" |
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/* try to fill the TLB and return an exception if error. If retaddr is
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NULL, it means that the function was called in C code (i.e. not
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from generated code or from helper.c) */
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/* XXX: fix it to restore all registers */
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void tlb_fill(CPUS390XState *env, target_ulong addr, int is_write, int mmu_idx, |
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uintptr_t retaddr) |
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{
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int ret;
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ret = cpu_s390x_handle_mmu_fault(env, addr, is_write, mmu_idx); |
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if (unlikely(ret != 0)) { |
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if (likely(retaddr)) {
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/* now we have a real cpu fault */
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cpu_restore_state(env, retaddr); |
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} |
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cpu_loop_exit(env); |
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} |
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} |
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#endif
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/* #define DEBUG_HELPER */
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#ifdef DEBUG_HELPER
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#define HELPER_LOG(x...) qemu_log(x)
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#else
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#define HELPER_LOG(x...)
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#endif
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#ifndef CONFIG_USER_ONLY
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static void mvc_fast_memset(CPUS390XState *env, uint32_t l, uint64_t dest, |
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uint8_t byte) |
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{
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hwaddr dest_phys; |
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hwaddr len = l; |
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void *dest_p;
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uint64_t asc = env->psw.mask & PSW_MASK_ASC; |
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int flags;
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if (mmu_translate(env, dest, 1, asc, &dest_phys, &flags)) { |
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cpu_stb_data(env, dest, byte); |
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cpu_abort(env, "should never reach here");
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} |
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dest_phys |= dest & ~TARGET_PAGE_MASK; |
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|
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dest_p = cpu_physical_memory_map(dest_phys, &len, 1);
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memset(dest_p, byte, len); |
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cpu_physical_memory_unmap(dest_p, 1, len, len);
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} |
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static void mvc_fast_memmove(CPUS390XState *env, uint32_t l, uint64_t dest, |
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uint64_t src) |
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{
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hwaddr dest_phys; |
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hwaddr src_phys; |
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hwaddr len = l; |
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void *dest_p;
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void *src_p;
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uint64_t asc = env->psw.mask & PSW_MASK_ASC; |
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int flags;
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if (mmu_translate(env, dest, 1, asc, &dest_phys, &flags)) { |
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cpu_stb_data(env, dest, 0);
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cpu_abort(env, "should never reach here");
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} |
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dest_phys |= dest & ~TARGET_PAGE_MASK; |
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if (mmu_translate(env, src, 0, asc, &src_phys, &flags)) { |
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cpu_ldub_data(env, src); |
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cpu_abort(env, "should never reach here");
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} |
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src_phys |= src & ~TARGET_PAGE_MASK; |
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dest_p = cpu_physical_memory_map(dest_phys, &len, 1);
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src_p = cpu_physical_memory_map(src_phys, &len, 0);
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memmove(dest_p, src_p, len); |
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cpu_physical_memory_unmap(dest_p, 1, len, len);
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cpu_physical_memory_unmap(src_p, 0, len, len);
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} |
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#endif
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|
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/* and on array */
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uint32_t HELPER(nc)(CPUS390XState *env, uint32_t l, uint64_t dest, |
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uint64_t src) |
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{
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int i;
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unsigned char x; |
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", |
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__func__, l, dest, src); |
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for (i = 0; i <= l; i++) { |
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x = cpu_ldub_data(env, dest + i) & cpu_ldub_data(env, src + i); |
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if (x) {
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cc = 1;
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} |
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cpu_stb_data(env, dest + i, x); |
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} |
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return cc;
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} |
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/* xor on array */
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uint32_t HELPER(xc)(CPUS390XState *env, uint32_t l, uint64_t dest, |
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uint64_t src) |
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{
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int i;
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unsigned char x; |
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", |
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__func__, l, dest, src); |
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#ifndef CONFIG_USER_ONLY
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/* xor with itself is the same as memset(0) */
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if ((l > 32) && (src == dest) && |
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(src & TARGET_PAGE_MASK) == ((src + l) & TARGET_PAGE_MASK)) {
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mvc_fast_memset(env, l + 1, dest, 0); |
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return 0; |
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} |
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#else
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if (src == dest) {
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memset(g2h(dest), 0, l + 1); |
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return 0; |
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} |
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#endif
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for (i = 0; i <= l; i++) { |
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x = cpu_ldub_data(env, dest + i) ^ cpu_ldub_data(env, src + i); |
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if (x) {
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cc = 1;
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} |
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cpu_stb_data(env, dest + i, x); |
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} |
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return cc;
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} |
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/* or on array */
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uint32_t HELPER(oc)(CPUS390XState *env, uint32_t l, uint64_t dest, |
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uint64_t src) |
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{
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int i;
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unsigned char x; |
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uint32_t cc = 0;
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", |
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__func__, l, dest, src); |
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for (i = 0; i <= l; i++) { |
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x = cpu_ldub_data(env, dest + i) | cpu_ldub_data(env, src + i); |
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if (x) {
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cc = 1;
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} |
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cpu_stb_data(env, dest + i, x); |
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} |
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return cc;
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} |
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/* memmove */
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void HELPER(mvc)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src)
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{
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int i = 0; |
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int x = 0; |
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uint32_t l_64 = (l + 1) / 8; |
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HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", |
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__func__, l, dest, src); |
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#ifndef CONFIG_USER_ONLY
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if ((l > 32) && |
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(src & TARGET_PAGE_MASK) == ((src + l) & TARGET_PAGE_MASK) && |
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(dest & TARGET_PAGE_MASK) == ((dest + l) & TARGET_PAGE_MASK)) {
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if (dest == (src + 1)) { |
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mvc_fast_memset(env, l + 1, dest, cpu_ldub_data(env, src));
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return;
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} else if ((src & TARGET_PAGE_MASK) != (dest & TARGET_PAGE_MASK)) { |
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mvc_fast_memmove(env, l + 1, dest, src);
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return;
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} |
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} |
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#else
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if (dest == (src + 1)) { |
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memset(g2h(dest), cpu_ldub_data(env, src), l + 1);
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return;
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} else {
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memmove(g2h(dest), g2h(src), l + 1);
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return;
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} |
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#endif
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/* handle the parts that fit into 8-byte loads/stores */
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if (dest != (src + 1)) { |
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for (i = 0; i < l_64; i++) { |
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cpu_stq_data(env, dest + x, cpu_ldq_data(env, src + x)); |
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x += 8;
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} |
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} |
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/* slow version crossing pages with byte accesses */
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for (i = x; i <= l; i++) {
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cpu_stb_data(env, dest + i, cpu_ldub_data(env, src + i)); |
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} |
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} |
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/* compare unsigned byte arrays */
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uint32_t HELPER(clc)(CPUS390XState *env, uint32_t l, uint64_t s1, uint64_t s2) |
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{
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int i;
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unsigned char x, y; |
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uint32_t cc; |
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HELPER_LOG("%s l %d s1 %" PRIx64 " s2 %" PRIx64 "\n", |
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__func__, l, s1, s2); |
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for (i = 0; i <= l; i++) { |
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x = cpu_ldub_data(env, s1 + i); |
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y = cpu_ldub_data(env, s2 + i); |
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HELPER_LOG("%02x (%c)/%02x (%c) ", x, x, y, y);
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if (x < y) {
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cc = 1;
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goto done;
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} else if (x > y) { |
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cc = 2;
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goto done;
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} |
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} |
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cc = 0;
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done:
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HELPER_LOG("\n");
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return cc;
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} |
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/* compare logical under mask */
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uint32_t HELPER(clm)(CPUS390XState *env, uint32_t r1, uint32_t mask, |
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uint64_t addr) |
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{
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uint8_t r, d; |
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uint32_t cc; |
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HELPER_LOG("%s: r1 0x%x mask 0x%x addr 0x%" PRIx64 "\n", __func__, r1, |
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mask, addr); |
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cc = 0;
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while (mask) {
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if (mask & 8) { |
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d = cpu_ldub_data(env, addr); |
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r = (r1 & 0xff000000UL) >> 24; |
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HELPER_LOG("mask 0x%x %02x/%02x (0x%" PRIx64 ") ", mask, r, d, |
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addr); |
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if (r < d) {
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cc = 1;
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break;
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} else if (r > d) { |
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cc = 2;
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break;
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} |
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addr++; |
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} |
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mask = (mask << 1) & 0xf; |
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r1 <<= 8;
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} |
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HELPER_LOG("\n");
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return cc;
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} |
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static inline uint64_t fix_address(CPUS390XState *env, uint64_t a) |
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{
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/* 31-Bit mode */
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if (!(env->psw.mask & PSW_MASK_64)) {
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a &= 0x7fffffff;
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} |
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return a;
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} |
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static inline uint64_t get_address(CPUS390XState *env, int x2, int b2, int d2) |
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{
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uint64_t r = d2; |
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if (x2) {
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r += env->regs[x2]; |
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} |
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if (b2) {
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r += env->regs[b2]; |
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} |
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return fix_address(env, r);
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} |
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|
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static inline uint64_t get_address_31fix(CPUS390XState *env, int reg) |
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{
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return fix_address(env, env->regs[reg]);
|
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} |
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|
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/* search string (c is byte to search, r2 is string, r1 end of string) */
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uint64_t HELPER(srst)(CPUS390XState *env, uint64_t r0, uint64_t end, |
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uint64_t str) |
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{
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uint32_t len; |
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uint8_t v, c = r0; |
| 339 |
|
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str = fix_address(env, str); |
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end = fix_address(env, end); |
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|
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/* Assume for now that R2 is unmodified. */
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env->retxl = str; |
| 345 |
|
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/* Lest we fail to service interrupts in a timely manner, limit the
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amount of work we're willing to do. For now, let's cap at 8k. */
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for (len = 0; len < 0x2000; ++len) { |
| 349 |
if (str + len == end) {
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/* Character not found. R1 & R2 are unmodified. */
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env->cc_op = 2;
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return end;
|
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} |
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v = cpu_ldub_data(env, str + len); |
| 355 |
if (v == c) {
|
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/* Character found. Set R1 to the location; R2 is unmodified. */
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env->cc_op = 1;
|
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return str + len;
|
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} |
| 360 |
} |
| 361 |
|
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/* CPU-determined bytes processed. Advance R2 to next byte to process. */
|
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env->retxl = str + len; |
| 364 |
env->cc_op = 3;
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return end;
|
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} |
| 367 |
|
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/* unsigned string compare (c is string terminator) */
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uint64_t HELPER(clst)(CPUS390XState *env, uint64_t c, uint64_t s1, uint64_t s2) |
| 370 |
{
|
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uint32_t len; |
| 372 |
|
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c = c & 0xff;
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s1 = fix_address(env, s1); |
| 375 |
s2 = fix_address(env, s2); |
| 376 |
|
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/* Lest we fail to service interrupts in a timely manner, limit the
|
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amount of work we're willing to do. For now, let's cap at 8k. */
|
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for (len = 0; len < 0x2000; ++len) { |
| 380 |
uint8_t v1 = cpu_ldub_data(env, s1 + len); |
| 381 |
uint8_t v2 = cpu_ldub_data(env, s2 + len); |
| 382 |
if (v1 == v2) {
|
| 383 |
if (v1 == c) {
|
| 384 |
/* Equal. CC=0, and don't advance the registers. */
|
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env->cc_op = 0;
|
| 386 |
env->retxl = s2; |
| 387 |
return s1;
|
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} |
| 389 |
} else {
|
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/* Unequal. CC={1,2}, and advance the registers. Note that
|
| 391 |
the terminator need not be zero, but the string that contains
|
| 392 |
the terminator is by definition "low". */
|
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env->cc_op = (v1 == c ? 1 : v2 == c ? 2 : v1 < v2 ? 1 : 2); |
| 394 |
env->retxl = s2 + len; |
| 395 |
return s1 + len;
|
| 396 |
} |
| 397 |
} |
| 398 |
|
| 399 |
/* CPU-determined bytes equal; advance the registers. */
|
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env->cc_op = 3;
|
| 401 |
env->retxl = s2 + len; |
| 402 |
return s1 + len;
|
| 403 |
} |
| 404 |
|
| 405 |
/* move page */
|
| 406 |
void HELPER(mvpg)(CPUS390XState *env, uint64_t r0, uint64_t r1, uint64_t r2)
|
| 407 |
{
|
| 408 |
/* XXX missing r0 handling */
|
| 409 |
env->cc_op = 0;
|
| 410 |
#ifdef CONFIG_USER_ONLY
|
| 411 |
memmove(g2h(r1), g2h(r2), TARGET_PAGE_SIZE); |
| 412 |
#else
|
| 413 |
mvc_fast_memmove(env, TARGET_PAGE_SIZE, r1, r2); |
| 414 |
#endif
|
| 415 |
} |
| 416 |
|
| 417 |
/* string copy (c is string terminator) */
|
| 418 |
uint64_t HELPER(mvst)(CPUS390XState *env, uint64_t c, uint64_t d, uint64_t s) |
| 419 |
{
|
| 420 |
uint32_t len; |
| 421 |
|
| 422 |
c = c & 0xff;
|
| 423 |
d = fix_address(env, d); |
| 424 |
s = fix_address(env, s); |
| 425 |
|
| 426 |
/* Lest we fail to service interrupts in a timely manner, limit the
|
| 427 |
amount of work we're willing to do. For now, let's cap at 8k. */
|
| 428 |
for (len = 0; len < 0x2000; ++len) { |
| 429 |
uint8_t v = cpu_ldub_data(env, s + len); |
| 430 |
cpu_stb_data(env, d + len, v); |
| 431 |
if (v == c) {
|
| 432 |
/* Complete. Set CC=1 and advance R1. */
|
| 433 |
env->cc_op = 1;
|
| 434 |
env->retxl = s; |
| 435 |
return d + len;
|
| 436 |
} |
| 437 |
} |
| 438 |
|
| 439 |
/* Incomplete. Set CC=3 and signal to advance R1 and R2. */
|
| 440 |
env->cc_op = 3;
|
| 441 |
env->retxl = s + len; |
| 442 |
return d + len;
|
| 443 |
} |
| 444 |
|
| 445 |
static uint32_t helper_icm(CPUS390XState *env, uint32_t r1, uint64_t address,
|
| 446 |
uint32_t mask) |
| 447 |
{
|
| 448 |
int pos = 24; /* top of the lower half of r1 */ |
| 449 |
uint64_t rmask = 0xff000000ULL;
|
| 450 |
uint8_t val = 0;
|
| 451 |
int ccd = 0; |
| 452 |
uint32_t cc = 0;
|
| 453 |
|
| 454 |
while (mask) {
|
| 455 |
if (mask & 8) { |
| 456 |
env->regs[r1] &= ~rmask; |
| 457 |
val = cpu_ldub_data(env, address); |
| 458 |
if ((val & 0x80) && !ccd) { |
| 459 |
cc = 1;
|
| 460 |
} |
| 461 |
ccd = 1;
|
| 462 |
if (val && cc == 0) { |
| 463 |
cc = 2;
|
| 464 |
} |
| 465 |
env->regs[r1] |= (uint64_t)val << pos; |
| 466 |
address++; |
| 467 |
} |
| 468 |
mask = (mask << 1) & 0xf; |
| 469 |
pos -= 8;
|
| 470 |
rmask >>= 8;
|
| 471 |
} |
| 472 |
|
| 473 |
return cc;
|
| 474 |
} |
| 475 |
|
| 476 |
/* execute instruction
|
| 477 |
this instruction executes an insn modified with the contents of r1
|
| 478 |
it does not change the executed instruction in memory
|
| 479 |
it does not change the program counter
|
| 480 |
in other words: tricky...
|
| 481 |
currently implemented by interpreting the cases it is most commonly used in
|
| 482 |
*/
|
| 483 |
uint32_t HELPER(ex)(CPUS390XState *env, uint32_t cc, uint64_t v1, |
| 484 |
uint64_t addr, uint64_t ret) |
| 485 |
{
|
| 486 |
uint16_t insn = cpu_lduw_code(env, addr); |
| 487 |
|
| 488 |
HELPER_LOG("%s: v1 0x%lx addr 0x%lx insn 0x%x\n", __func__, v1, addr,
|
| 489 |
insn); |
| 490 |
if ((insn & 0xf0ff) == 0xd000) { |
| 491 |
uint32_t l, insn2, b1, b2, d1, d2; |
| 492 |
|
| 493 |
l = v1 & 0xff;
|
| 494 |
insn2 = cpu_ldl_code(env, addr + 2);
|
| 495 |
b1 = (insn2 >> 28) & 0xf; |
| 496 |
b2 = (insn2 >> 12) & 0xf; |
| 497 |
d1 = (insn2 >> 16) & 0xfff; |
| 498 |
d2 = insn2 & 0xfff;
|
| 499 |
switch (insn & 0xf00) { |
| 500 |
case 0x200: |
| 501 |
helper_mvc(env, l, get_address(env, 0, b1, d1),
|
| 502 |
get_address(env, 0, b2, d2));
|
| 503 |
break;
|
| 504 |
case 0x500: |
| 505 |
cc = helper_clc(env, l, get_address(env, 0, b1, d1),
|
| 506 |
get_address(env, 0, b2, d2));
|
| 507 |
break;
|
| 508 |
case 0x700: |
| 509 |
cc = helper_xc(env, l, get_address(env, 0, b1, d1),
|
| 510 |
get_address(env, 0, b2, d2));
|
| 511 |
break;
|
| 512 |
case 0xc00: |
| 513 |
helper_tr(env, l, get_address(env, 0, b1, d1),
|
| 514 |
get_address(env, 0, b2, d2));
|
| 515 |
break;
|
| 516 |
default:
|
| 517 |
goto abort;
|
| 518 |
} |
| 519 |
} else if ((insn & 0xff00) == 0x0a00) { |
| 520 |
/* supervisor call */
|
| 521 |
HELPER_LOG("%s: svc %ld via execute\n", __func__, (insn | v1) & 0xff); |
| 522 |
env->psw.addr = ret - 4;
|
| 523 |
env->int_svc_code = (insn | v1) & 0xff;
|
| 524 |
env->int_svc_ilen = 4;
|
| 525 |
helper_exception(env, EXCP_SVC); |
| 526 |
} else if ((insn & 0xff00) == 0xbf00) { |
| 527 |
uint32_t insn2, r1, r3, b2, d2; |
| 528 |
|
| 529 |
insn2 = cpu_ldl_code(env, addr + 2);
|
| 530 |
r1 = (insn2 >> 20) & 0xf; |
| 531 |
r3 = (insn2 >> 16) & 0xf; |
| 532 |
b2 = (insn2 >> 12) & 0xf; |
| 533 |
d2 = insn2 & 0xfff;
|
| 534 |
cc = helper_icm(env, r1, get_address(env, 0, b2, d2), r3);
|
| 535 |
} else {
|
| 536 |
abort:
|
| 537 |
cpu_abort(env, "EXECUTE on instruction prefix 0x%x not implemented\n",
|
| 538 |
insn); |
| 539 |
} |
| 540 |
return cc;
|
| 541 |
} |
| 542 |
|
| 543 |
/* load access registers r1 to r3 from memory at a2 */
|
| 544 |
void HELPER(lam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 545 |
{
|
| 546 |
int i;
|
| 547 |
|
| 548 |
for (i = r1;; i = (i + 1) % 16) { |
| 549 |
env->aregs[i] = cpu_ldl_data(env, a2); |
| 550 |
a2 += 4;
|
| 551 |
|
| 552 |
if (i == r3) {
|
| 553 |
break;
|
| 554 |
} |
| 555 |
} |
| 556 |
} |
| 557 |
|
| 558 |
/* store access registers r1 to r3 in memory at a2 */
|
| 559 |
void HELPER(stam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 560 |
{
|
| 561 |
int i;
|
| 562 |
|
| 563 |
for (i = r1;; i = (i + 1) % 16) { |
| 564 |
cpu_stl_data(env, a2, env->aregs[i]); |
| 565 |
a2 += 4;
|
| 566 |
|
| 567 |
if (i == r3) {
|
| 568 |
break;
|
| 569 |
} |
| 570 |
} |
| 571 |
} |
| 572 |
|
| 573 |
/* move long */
|
| 574 |
uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2) |
| 575 |
{
|
| 576 |
uint64_t destlen = env->regs[r1 + 1] & 0xffffff; |
| 577 |
uint64_t dest = get_address_31fix(env, r1); |
| 578 |
uint64_t srclen = env->regs[r2 + 1] & 0xffffff; |
| 579 |
uint64_t src = get_address_31fix(env, r2); |
| 580 |
uint8_t pad = src >> 24;
|
| 581 |
uint8_t v; |
| 582 |
uint32_t cc; |
| 583 |
|
| 584 |
if (destlen == srclen) {
|
| 585 |
cc = 0;
|
| 586 |
} else if (destlen < srclen) { |
| 587 |
cc = 1;
|
| 588 |
} else {
|
| 589 |
cc = 2;
|
| 590 |
} |
| 591 |
|
| 592 |
if (srclen > destlen) {
|
| 593 |
srclen = destlen; |
| 594 |
} |
| 595 |
|
| 596 |
for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
|
| 597 |
v = cpu_ldub_data(env, src); |
| 598 |
cpu_stb_data(env, dest, v); |
| 599 |
} |
| 600 |
|
| 601 |
for (; destlen; dest++, destlen--) {
|
| 602 |
cpu_stb_data(env, dest, pad); |
| 603 |
} |
| 604 |
|
| 605 |
env->regs[r1 + 1] = destlen;
|
| 606 |
/* can't use srclen here, we trunc'ed it */
|
| 607 |
env->regs[r2 + 1] -= src - env->regs[r2];
|
| 608 |
env->regs[r1] = dest; |
| 609 |
env->regs[r2] = src; |
| 610 |
|
| 611 |
return cc;
|
| 612 |
} |
| 613 |
|
| 614 |
/* move long extended another memcopy insn with more bells and whistles */
|
| 615 |
uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2, |
| 616 |
uint32_t r3) |
| 617 |
{
|
| 618 |
uint64_t destlen = env->regs[r1 + 1];
|
| 619 |
uint64_t dest = env->regs[r1]; |
| 620 |
uint64_t srclen = env->regs[r3 + 1];
|
| 621 |
uint64_t src = env->regs[r3]; |
| 622 |
uint8_t pad = a2 & 0xff;
|
| 623 |
uint8_t v; |
| 624 |
uint32_t cc; |
| 625 |
|
| 626 |
if (!(env->psw.mask & PSW_MASK_64)) {
|
| 627 |
destlen = (uint32_t)destlen; |
| 628 |
srclen = (uint32_t)srclen; |
| 629 |
dest &= 0x7fffffff;
|
| 630 |
src &= 0x7fffffff;
|
| 631 |
} |
| 632 |
|
| 633 |
if (destlen == srclen) {
|
| 634 |
cc = 0;
|
| 635 |
} else if (destlen < srclen) { |
| 636 |
cc = 1;
|
| 637 |
} else {
|
| 638 |
cc = 2;
|
| 639 |
} |
| 640 |
|
| 641 |
if (srclen > destlen) {
|
| 642 |
srclen = destlen; |
| 643 |
} |
| 644 |
|
| 645 |
for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
|
| 646 |
v = cpu_ldub_data(env, src); |
| 647 |
cpu_stb_data(env, dest, v); |
| 648 |
} |
| 649 |
|
| 650 |
for (; destlen; dest++, destlen--) {
|
| 651 |
cpu_stb_data(env, dest, pad); |
| 652 |
} |
| 653 |
|
| 654 |
env->regs[r1 + 1] = destlen;
|
| 655 |
/* can't use srclen here, we trunc'ed it */
|
| 656 |
/* FIXME: 31-bit mode! */
|
| 657 |
env->regs[r3 + 1] -= src - env->regs[r3];
|
| 658 |
env->regs[r1] = dest; |
| 659 |
env->regs[r3] = src; |
| 660 |
|
| 661 |
return cc;
|
| 662 |
} |
| 663 |
|
| 664 |
/* compare logical long extended memcompare insn with padding */
|
| 665 |
uint32_t HELPER(clcle)(CPUS390XState *env, uint32_t r1, uint64_t a2, |
| 666 |
uint32_t r3) |
| 667 |
{
|
| 668 |
uint64_t destlen = env->regs[r1 + 1];
|
| 669 |
uint64_t dest = get_address_31fix(env, r1); |
| 670 |
uint64_t srclen = env->regs[r3 + 1];
|
| 671 |
uint64_t src = get_address_31fix(env, r3); |
| 672 |
uint8_t pad = a2 & 0xff;
|
| 673 |
uint8_t v1 = 0, v2 = 0; |
| 674 |
uint32_t cc = 0;
|
| 675 |
|
| 676 |
if (!(destlen || srclen)) {
|
| 677 |
return cc;
|
| 678 |
} |
| 679 |
|
| 680 |
if (srclen > destlen) {
|
| 681 |
srclen = destlen; |
| 682 |
} |
| 683 |
|
| 684 |
for (; destlen || srclen; src++, dest++, destlen--, srclen--) {
|
| 685 |
v1 = srclen ? cpu_ldub_data(env, src) : pad; |
| 686 |
v2 = destlen ? cpu_ldub_data(env, dest) : pad; |
| 687 |
if (v1 != v2) {
|
| 688 |
cc = (v1 < v2) ? 1 : 2; |
| 689 |
break;
|
| 690 |
} |
| 691 |
} |
| 692 |
|
| 693 |
env->regs[r1 + 1] = destlen;
|
| 694 |
/* can't use srclen here, we trunc'ed it */
|
| 695 |
env->regs[r3 + 1] -= src - env->regs[r3];
|
| 696 |
env->regs[r1] = dest; |
| 697 |
env->regs[r3] = src; |
| 698 |
|
| 699 |
return cc;
|
| 700 |
} |
| 701 |
|
| 702 |
/* checksum */
|
| 703 |
uint64_t HELPER(cksm)(CPUS390XState *env, uint64_t r1, |
| 704 |
uint64_t src, uint64_t src_len) |
| 705 |
{
|
| 706 |
uint64_t max_len, len; |
| 707 |
uint64_t cksm = (uint32_t)r1; |
| 708 |
|
| 709 |
/* Lest we fail to service interrupts in a timely manner, limit the
|
| 710 |
amount of work we're willing to do. For now, let's cap at 8k. */
|
| 711 |
max_len = (src_len > 0x2000 ? 0x2000 : src_len); |
| 712 |
|
| 713 |
/* Process full words as available. */
|
| 714 |
for (len = 0; len + 4 <= max_len; len += 4, src += 4) { |
| 715 |
cksm += (uint32_t)cpu_ldl_data(env, src); |
| 716 |
} |
| 717 |
|
| 718 |
switch (max_len - len) {
|
| 719 |
case 1: |
| 720 |
cksm += cpu_ldub_data(env, src) << 24;
|
| 721 |
len += 1;
|
| 722 |
break;
|
| 723 |
case 2: |
| 724 |
cksm += cpu_lduw_data(env, src) << 16;
|
| 725 |
len += 2;
|
| 726 |
break;
|
| 727 |
case 3: |
| 728 |
cksm += cpu_lduw_data(env, src) << 16;
|
| 729 |
cksm += cpu_ldub_data(env, src + 2) << 8; |
| 730 |
len += 3;
|
| 731 |
break;
|
| 732 |
} |
| 733 |
|
| 734 |
/* Fold the carry from the checksum. Note that we can see carry-out
|
| 735 |
during folding more than once (but probably not more than twice). */
|
| 736 |
while (cksm > 0xffffffffull) { |
| 737 |
cksm = (uint32_t)cksm + (cksm >> 32);
|
| 738 |
} |
| 739 |
|
| 740 |
/* Indicate whether or not we've processed everything. */
|
| 741 |
env->cc_op = (len == src_len ? 0 : 3); |
| 742 |
|
| 743 |
/* Return both cksm and processed length. */
|
| 744 |
env->retxl = cksm; |
| 745 |
return len;
|
| 746 |
} |
| 747 |
|
| 748 |
void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
|
| 749 |
uint64_t src) |
| 750 |
{
|
| 751 |
int len_dest = len >> 4; |
| 752 |
int len_src = len & 0xf; |
| 753 |
uint8_t b; |
| 754 |
int second_nibble = 0; |
| 755 |
|
| 756 |
dest += len_dest; |
| 757 |
src += len_src; |
| 758 |
|
| 759 |
/* last byte is special, it only flips the nibbles */
|
| 760 |
b = cpu_ldub_data(env, src); |
| 761 |
cpu_stb_data(env, dest, (b << 4) | (b >> 4)); |
| 762 |
src--; |
| 763 |
len_src--; |
| 764 |
|
| 765 |
/* now pad every nibble with 0xf0 */
|
| 766 |
|
| 767 |
while (len_dest > 0) { |
| 768 |
uint8_t cur_byte = 0;
|
| 769 |
|
| 770 |
if (len_src > 0) { |
| 771 |
cur_byte = cpu_ldub_data(env, src); |
| 772 |
} |
| 773 |
|
| 774 |
len_dest--; |
| 775 |
dest--; |
| 776 |
|
| 777 |
/* only advance one nibble at a time */
|
| 778 |
if (second_nibble) {
|
| 779 |
cur_byte >>= 4;
|
| 780 |
len_src--; |
| 781 |
src--; |
| 782 |
} |
| 783 |
second_nibble = !second_nibble; |
| 784 |
|
| 785 |
/* digit */
|
| 786 |
cur_byte = (cur_byte & 0xf);
|
| 787 |
/* zone bits */
|
| 788 |
cur_byte |= 0xf0;
|
| 789 |
|
| 790 |
cpu_stb_data(env, dest, cur_byte); |
| 791 |
} |
| 792 |
} |
| 793 |
|
| 794 |
void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array,
|
| 795 |
uint64_t trans) |
| 796 |
{
|
| 797 |
int i;
|
| 798 |
|
| 799 |
for (i = 0; i <= len; i++) { |
| 800 |
uint8_t byte = cpu_ldub_data(env, array + i); |
| 801 |
uint8_t new_byte = cpu_ldub_data(env, trans + byte); |
| 802 |
|
| 803 |
cpu_stb_data(env, array + i, new_byte); |
| 804 |
} |
| 805 |
} |
| 806 |
|
| 807 |
#if !defined(CONFIG_USER_ONLY)
|
| 808 |
void HELPER(lctlg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 809 |
{
|
| 810 |
int i;
|
| 811 |
uint64_t src = a2; |
| 812 |
|
| 813 |
for (i = r1;; i = (i + 1) % 16) { |
| 814 |
env->cregs[i] = cpu_ldq_data(env, src); |
| 815 |
HELPER_LOG("load ctl %d from 0x%" PRIx64 " == 0x%" PRIx64 "\n", |
| 816 |
i, src, env->cregs[i]); |
| 817 |
src += sizeof(uint64_t);
|
| 818 |
|
| 819 |
if (i == r3) {
|
| 820 |
break;
|
| 821 |
} |
| 822 |
} |
| 823 |
|
| 824 |
tlb_flush(env, 1);
|
| 825 |
} |
| 826 |
|
| 827 |
void HELPER(lctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 828 |
{
|
| 829 |
int i;
|
| 830 |
uint64_t src = a2; |
| 831 |
|
| 832 |
for (i = r1;; i = (i + 1) % 16) { |
| 833 |
env->cregs[i] = (env->cregs[i] & 0xFFFFFFFF00000000ULL) |
|
| 834 |
cpu_ldl_data(env, src); |
| 835 |
src += sizeof(uint32_t);
|
| 836 |
|
| 837 |
if (i == r3) {
|
| 838 |
break;
|
| 839 |
} |
| 840 |
} |
| 841 |
|
| 842 |
tlb_flush(env, 1);
|
| 843 |
} |
| 844 |
|
| 845 |
void HELPER(stctg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 846 |
{
|
| 847 |
int i;
|
| 848 |
uint64_t dest = a2; |
| 849 |
|
| 850 |
for (i = r1;; i = (i + 1) % 16) { |
| 851 |
cpu_stq_data(env, dest, env->cregs[i]); |
| 852 |
dest += sizeof(uint64_t);
|
| 853 |
|
| 854 |
if (i == r3) {
|
| 855 |
break;
|
| 856 |
} |
| 857 |
} |
| 858 |
} |
| 859 |
|
| 860 |
void HELPER(stctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
|
| 861 |
{
|
| 862 |
int i;
|
| 863 |
uint64_t dest = a2; |
| 864 |
|
| 865 |
for (i = r1;; i = (i + 1) % 16) { |
| 866 |
cpu_stl_data(env, dest, env->cregs[i]); |
| 867 |
dest += sizeof(uint32_t);
|
| 868 |
|
| 869 |
if (i == r3) {
|
| 870 |
break;
|
| 871 |
} |
| 872 |
} |
| 873 |
} |
| 874 |
|
| 875 |
uint32_t HELPER(tprot)(uint64_t a1, uint64_t a2) |
| 876 |
{
|
| 877 |
/* XXX implement */
|
| 878 |
|
| 879 |
return 0; |
| 880 |
} |
| 881 |
|
| 882 |
/* insert storage key extended */
|
| 883 |
uint64_t HELPER(iske)(CPUS390XState *env, uint64_t r2) |
| 884 |
{
|
| 885 |
uint64_t addr = get_address(env, 0, 0, r2); |
| 886 |
|
| 887 |
if (addr > ram_size) {
|
| 888 |
return 0; |
| 889 |
} |
| 890 |
|
| 891 |
return env->storage_keys[addr / TARGET_PAGE_SIZE];
|
| 892 |
} |
| 893 |
|
| 894 |
/* set storage key extended */
|
| 895 |
void HELPER(sske)(CPUS390XState *env, uint64_t r1, uint64_t r2)
|
| 896 |
{
|
| 897 |
uint64_t addr = get_address(env, 0, 0, r2); |
| 898 |
|
| 899 |
if (addr > ram_size) {
|
| 900 |
return;
|
| 901 |
} |
| 902 |
|
| 903 |
env->storage_keys[addr / TARGET_PAGE_SIZE] = r1; |
| 904 |
} |
| 905 |
|
| 906 |
/* reset reference bit extended */
|
| 907 |
uint32_t HELPER(rrbe)(CPUS390XState *env, uint64_t r2) |
| 908 |
{
|
| 909 |
uint8_t re; |
| 910 |
uint8_t key; |
| 911 |
|
| 912 |
if (r2 > ram_size) {
|
| 913 |
return 0; |
| 914 |
} |
| 915 |
|
| 916 |
key = env->storage_keys[r2 / TARGET_PAGE_SIZE]; |
| 917 |
re = key & (SK_R | SK_C); |
| 918 |
env->storage_keys[r2 / TARGET_PAGE_SIZE] = (key & ~SK_R); |
| 919 |
|
| 920 |
/*
|
| 921 |
* cc
|
| 922 |
*
|
| 923 |
* 0 Reference bit zero; change bit zero
|
| 924 |
* 1 Reference bit zero; change bit one
|
| 925 |
* 2 Reference bit one; change bit zero
|
| 926 |
* 3 Reference bit one; change bit one
|
| 927 |
*/
|
| 928 |
|
| 929 |
return re >> 1; |
| 930 |
} |
| 931 |
|
| 932 |
/* compare and swap and purge */
|
| 933 |
uint32_t HELPER(csp)(CPUS390XState *env, uint32_t r1, uint64_t r2) |
| 934 |
{
|
| 935 |
uint32_t cc; |
| 936 |
uint32_t o1 = env->regs[r1]; |
| 937 |
uint64_t a2 = r2 & ~3ULL;
|
| 938 |
uint32_t o2 = cpu_ldl_data(env, a2); |
| 939 |
|
| 940 |
if (o1 == o2) {
|
| 941 |
cpu_stl_data(env, a2, env->regs[(r1 + 1) & 15]); |
| 942 |
if (r2 & 0x3) { |
| 943 |
/* flush TLB / ALB */
|
| 944 |
tlb_flush(env, 1);
|
| 945 |
} |
| 946 |
cc = 0;
|
| 947 |
} else {
|
| 948 |
env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) | o2;
|
| 949 |
cc = 1;
|
| 950 |
} |
| 951 |
|
| 952 |
return cc;
|
| 953 |
} |
| 954 |
|
| 955 |
static uint32_t mvc_asc(CPUS390XState *env, int64_t l, uint64_t a1,
|
| 956 |
uint64_t mode1, uint64_t a2, uint64_t mode2) |
| 957 |
{
|
| 958 |
target_ulong src, dest; |
| 959 |
int flags, cc = 0, i; |
| 960 |
|
| 961 |
if (!l) {
|
| 962 |
return 0; |
| 963 |
} else if (l > 256) { |
| 964 |
/* max 256 */
|
| 965 |
l = 256;
|
| 966 |
cc = 3;
|
| 967 |
} |
| 968 |
|
| 969 |
if (mmu_translate(env, a1 & TARGET_PAGE_MASK, 1, mode1, &dest, &flags)) { |
| 970 |
cpu_loop_exit(env); |
| 971 |
} |
| 972 |
dest |= a1 & ~TARGET_PAGE_MASK; |
| 973 |
|
| 974 |
if (mmu_translate(env, a2 & TARGET_PAGE_MASK, 0, mode2, &src, &flags)) { |
| 975 |
cpu_loop_exit(env); |
| 976 |
} |
| 977 |
src |= a2 & ~TARGET_PAGE_MASK; |
| 978 |
|
| 979 |
/* XXX replace w/ memcpy */
|
| 980 |
for (i = 0; i < l; i++) { |
| 981 |
/* XXX be more clever */
|
| 982 |
if ((((dest + i) & TARGET_PAGE_MASK) != (dest & TARGET_PAGE_MASK)) ||
|
| 983 |
(((src + i) & TARGET_PAGE_MASK) != (src & TARGET_PAGE_MASK))) {
|
| 984 |
mvc_asc(env, l - i, a1 + i, mode1, a2 + i, mode2); |
| 985 |
break;
|
| 986 |
} |
| 987 |
stb_phys(dest + i, ldub_phys(src + i)); |
| 988 |
} |
| 989 |
|
| 990 |
return cc;
|
| 991 |
} |
| 992 |
|
| 993 |
uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) |
| 994 |
{
|
| 995 |
HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", |
| 996 |
__func__, l, a1, a2); |
| 997 |
|
| 998 |
return mvc_asc(env, l, a1, PSW_ASC_SECONDARY, a2, PSW_ASC_PRIMARY);
|
| 999 |
} |
| 1000 |
|
| 1001 |
uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) |
| 1002 |
{
|
| 1003 |
HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", |
| 1004 |
__func__, l, a1, a2); |
| 1005 |
|
| 1006 |
return mvc_asc(env, l, a1, PSW_ASC_PRIMARY, a2, PSW_ASC_SECONDARY);
|
| 1007 |
} |
| 1008 |
|
| 1009 |
/* invalidate pte */
|
| 1010 |
void HELPER(ipte)(CPUS390XState *env, uint64_t pte_addr, uint64_t vaddr)
|
| 1011 |
{
|
| 1012 |
uint64_t page = vaddr & TARGET_PAGE_MASK; |
| 1013 |
uint64_t pte = 0;
|
| 1014 |
|
| 1015 |
/* XXX broadcast to other CPUs */
|
| 1016 |
|
| 1017 |
/* XXX Linux is nice enough to give us the exact pte address.
|
| 1018 |
According to spec we'd have to find it out ourselves */
|
| 1019 |
/* XXX Linux is fine with overwriting the pte, the spec requires
|
| 1020 |
us to only set the invalid bit */
|
| 1021 |
stq_phys(pte_addr, pte | _PAGE_INVALID); |
| 1022 |
|
| 1023 |
/* XXX we exploit the fact that Linux passes the exact virtual
|
| 1024 |
address here - it's not obliged to! */
|
| 1025 |
tlb_flush_page(env, page); |
| 1026 |
|
| 1027 |
/* XXX 31-bit hack */
|
| 1028 |
if (page & 0x80000000) { |
| 1029 |
tlb_flush_page(env, page & ~0x80000000);
|
| 1030 |
} else {
|
| 1031 |
tlb_flush_page(env, page | 0x80000000);
|
| 1032 |
} |
| 1033 |
} |
| 1034 |
|
| 1035 |
/* flush local tlb */
|
| 1036 |
void HELPER(ptlb)(CPUS390XState *env)
|
| 1037 |
{
|
| 1038 |
tlb_flush(env, 1);
|
| 1039 |
} |
| 1040 |
|
| 1041 |
/* store using real address */
|
| 1042 |
void HELPER(stura)(CPUS390XState *env, uint64_t addr, uint64_t v1)
|
| 1043 |
{
|
| 1044 |
stw_phys(get_address(env, 0, 0, addr), (uint32_t)v1); |
| 1045 |
} |
| 1046 |
|
| 1047 |
/* load real address */
|
| 1048 |
uint64_t HELPER(lra)(CPUS390XState *env, uint64_t addr) |
| 1049 |
{
|
| 1050 |
uint32_t cc = 0;
|
| 1051 |
int old_exc = env->exception_index;
|
| 1052 |
uint64_t asc = env->psw.mask & PSW_MASK_ASC; |
| 1053 |
uint64_t ret; |
| 1054 |
int flags;
|
| 1055 |
|
| 1056 |
/* XXX incomplete - has more corner cases */
|
| 1057 |
if (!(env->psw.mask & PSW_MASK_64) && (addr >> 32)) { |
| 1058 |
program_interrupt(env, PGM_SPECIAL_OP, 2);
|
| 1059 |
} |
| 1060 |
|
| 1061 |
env->exception_index = old_exc; |
| 1062 |
if (mmu_translate(env, addr, 0, asc, &ret, &flags)) { |
| 1063 |
cc = 3;
|
| 1064 |
} |
| 1065 |
if (env->exception_index == EXCP_PGM) {
|
| 1066 |
ret = env->int_pgm_code | 0x80000000;
|
| 1067 |
} else {
|
| 1068 |
ret |= addr & ~TARGET_PAGE_MASK; |
| 1069 |
} |
| 1070 |
env->exception_index = old_exc; |
| 1071 |
|
| 1072 |
env->cc_op = cc; |
| 1073 |
return ret;
|
| 1074 |
} |
| 1075 |
#endif
|