diff options
Diffstat (limited to 'qemu/target-s390x/mem_helper.c')
-rw-r--r-- | qemu/target-s390x/mem_helper.c | 1198 |
1 files changed, 0 insertions, 1198 deletions
diff --git a/qemu/target-s390x/mem_helper.c b/qemu/target-s390x/mem_helper.c deleted file mode 100644 index 707862203..000000000 --- a/qemu/target-s390x/mem_helper.c +++ /dev/null @@ -1,1198 +0,0 @@ -/* - * S/390 memory access helper routines - * - * Copyright (c) 2009 Ulrich Hecht - * Copyright (c) 2009 Alexander Graf - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu/osdep.h" -#include "cpu.h" -#include "exec/helper-proto.h" -#include "exec/cpu_ldst.h" -#include "hw/s390x/storage-keys.h" - -/*****************************************************************************/ -/* Softmmu support */ -#if !defined(CONFIG_USER_ONLY) - -/* try to fill the TLB and return an exception if error. If retaddr is - NULL, it means that the function was called in C code (i.e. not - from generated code or from helper.c) */ -/* XXX: fix it to restore all registers */ -void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx, - uintptr_t retaddr) -{ - int ret; - - ret = s390_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx); - if (unlikely(ret != 0)) { - if (likely(retaddr)) { - /* now we have a real cpu fault */ - cpu_restore_state(cs, retaddr); - } - cpu_loop_exit(cs); - } -} - -#endif - -/* #define DEBUG_HELPER */ -#ifdef DEBUG_HELPER -#define HELPER_LOG(x...) qemu_log(x) -#else -#define HELPER_LOG(x...) -#endif - -/* Reduce the length so that addr + len doesn't cross a page boundary. */ -static inline uint64_t adj_len_to_page(uint64_t len, uint64_t addr) -{ -#ifndef CONFIG_USER_ONLY - if ((addr & ~TARGET_PAGE_MASK) + len - 1 >= TARGET_PAGE_SIZE) { - return -addr & ~TARGET_PAGE_MASK; - } -#endif - return len; -} - -static void fast_memset(CPUS390XState *env, uint64_t dest, uint8_t byte, - uint32_t l) -{ - int mmu_idx = cpu_mmu_index(env, false); - - while (l > 0) { - void *p = tlb_vaddr_to_host(env, dest, MMU_DATA_STORE, mmu_idx); - if (p) { - /* Access to the whole page in write mode granted. */ - int l_adj = adj_len_to_page(l, dest); - memset(p, byte, l_adj); - dest += l_adj; - l -= l_adj; - } else { - /* We failed to get access to the whole page. The next write - access will likely fill the QEMU TLB for the next iteration. */ - cpu_stb_data(env, dest, byte); - dest++; - l--; - } - } -} - -static void fast_memmove(CPUS390XState *env, uint64_t dest, uint64_t src, - uint32_t l) -{ - int mmu_idx = cpu_mmu_index(env, false); - - while (l > 0) { - void *src_p = tlb_vaddr_to_host(env, src, MMU_DATA_LOAD, mmu_idx); - void *dest_p = tlb_vaddr_to_host(env, dest, MMU_DATA_STORE, mmu_idx); - if (src_p && dest_p) { - /* Access to both whole pages granted. */ - int l_adj = adj_len_to_page(l, src); - l_adj = adj_len_to_page(l_adj, dest); - memmove(dest_p, src_p, l_adj); - src += l_adj; - dest += l_adj; - l -= l_adj; - } else { - /* We failed to get access to one or both whole pages. The next - read or write access will likely fill the QEMU TLB for the - next iteration. */ - cpu_stb_data(env, dest, cpu_ldub_data(env, src)); - src++; - dest++; - l--; - } - } -} - -/* and on array */ -uint32_t HELPER(nc)(CPUS390XState *env, uint32_t l, uint64_t dest, - uint64_t src) -{ - int i; - unsigned char x; - uint32_t cc = 0; - - HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", - __func__, l, dest, src); - for (i = 0; i <= l; i++) { - x = cpu_ldub_data(env, dest + i) & cpu_ldub_data(env, src + i); - if (x) { - cc = 1; - } - cpu_stb_data(env, dest + i, x); - } - return cc; -} - -/* xor on array */ -uint32_t HELPER(xc)(CPUS390XState *env, uint32_t l, uint64_t dest, - uint64_t src) -{ - int i; - unsigned char x; - uint32_t cc = 0; - - HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", - __func__, l, dest, src); - - /* xor with itself is the same as memset(0) */ - if (src == dest) { - fast_memset(env, dest, 0, l + 1); - return 0; - } - - for (i = 0; i <= l; i++) { - x = cpu_ldub_data(env, dest + i) ^ cpu_ldub_data(env, src + i); - if (x) { - cc = 1; - } - cpu_stb_data(env, dest + i, x); - } - return cc; -} - -/* or on array */ -uint32_t HELPER(oc)(CPUS390XState *env, uint32_t l, uint64_t dest, - uint64_t src) -{ - int i; - unsigned char x; - uint32_t cc = 0; - - HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", - __func__, l, dest, src); - for (i = 0; i <= l; i++) { - x = cpu_ldub_data(env, dest + i) | cpu_ldub_data(env, src + i); - if (x) { - cc = 1; - } - cpu_stb_data(env, dest + i, x); - } - return cc; -} - -/* memmove */ -void HELPER(mvc)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src) -{ - int i = 0; - - HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", - __func__, l, dest, src); - - /* mvc with source pointing to the byte after the destination is the - same as memset with the first source byte */ - if (dest == (src + 1)) { - fast_memset(env, dest, cpu_ldub_data(env, src), l + 1); - return; - } - - /* mvc and memmove do not behave the same when areas overlap! */ - if ((dest < src) || (src + l < dest)) { - fast_memmove(env, dest, src, l + 1); - return; - } - - /* slow version with byte accesses which always work */ - for (i = 0; i <= l; i++) { - cpu_stb_data(env, dest + i, cpu_ldub_data(env, src + i)); - } -} - -/* compare unsigned byte arrays */ -uint32_t HELPER(clc)(CPUS390XState *env, uint32_t l, uint64_t s1, uint64_t s2) -{ - int i; - unsigned char x, y; - uint32_t cc; - - HELPER_LOG("%s l %d s1 %" PRIx64 " s2 %" PRIx64 "\n", - __func__, l, s1, s2); - for (i = 0; i <= l; i++) { - x = cpu_ldub_data(env, s1 + i); - y = cpu_ldub_data(env, s2 + i); - HELPER_LOG("%02x (%c)/%02x (%c) ", x, x, y, y); - if (x < y) { - cc = 1; - goto done; - } else if (x > y) { - cc = 2; - goto done; - } - } - cc = 0; - done: - HELPER_LOG("\n"); - return cc; -} - -/* compare logical under mask */ -uint32_t HELPER(clm)(CPUS390XState *env, uint32_t r1, uint32_t mask, - uint64_t addr) -{ - uint8_t r, d; - uint32_t cc; - - HELPER_LOG("%s: r1 0x%x mask 0x%x addr 0x%" PRIx64 "\n", __func__, r1, - mask, addr); - cc = 0; - while (mask) { - if (mask & 8) { - d = cpu_ldub_data(env, addr); - r = (r1 & 0xff000000UL) >> 24; - HELPER_LOG("mask 0x%x %02x/%02x (0x%" PRIx64 ") ", mask, r, d, - addr); - if (r < d) { - cc = 1; - break; - } else if (r > d) { - cc = 2; - break; - } - addr++; - } - mask = (mask << 1) & 0xf; - r1 <<= 8; - } - HELPER_LOG("\n"); - return cc; -} - -static inline uint64_t fix_address(CPUS390XState *env, uint64_t a) -{ - /* 31-Bit mode */ - if (!(env->psw.mask & PSW_MASK_64)) { - a &= 0x7fffffff; - } - return a; -} - -static inline uint64_t get_address(CPUS390XState *env, int x2, int b2, int d2) -{ - uint64_t r = d2; - if (x2) { - r += env->regs[x2]; - } - if (b2) { - r += env->regs[b2]; - } - return fix_address(env, r); -} - -static inline uint64_t get_address_31fix(CPUS390XState *env, int reg) -{ - return fix_address(env, env->regs[reg]); -} - -/* search string (c is byte to search, r2 is string, r1 end of string) */ -uint64_t HELPER(srst)(CPUS390XState *env, uint64_t r0, uint64_t end, - uint64_t str) -{ - uint32_t len; - uint8_t v, c = r0; - - str = fix_address(env, str); - end = fix_address(env, end); - - /* Assume for now that R2 is unmodified. */ - env->retxl = str; - - /* Lest we fail to service interrupts in a timely manner, limit the - amount of work we're willing to do. For now, let's cap at 8k. */ - for (len = 0; len < 0x2000; ++len) { - if (str + len == end) { - /* Character not found. R1 & R2 are unmodified. */ - env->cc_op = 2; - return end; - } - v = cpu_ldub_data(env, str + len); - if (v == c) { - /* Character found. Set R1 to the location; R2 is unmodified. */ - env->cc_op = 1; - return str + len; - } - } - - /* CPU-determined bytes processed. Advance R2 to next byte to process. */ - env->retxl = str + len; - env->cc_op = 3; - return end; -} - -/* unsigned string compare (c is string terminator) */ -uint64_t HELPER(clst)(CPUS390XState *env, uint64_t c, uint64_t s1, uint64_t s2) -{ - uint32_t len; - - c = c & 0xff; - s1 = fix_address(env, s1); - s2 = fix_address(env, s2); - - /* Lest we fail to service interrupts in a timely manner, limit the - amount of work we're willing to do. For now, let's cap at 8k. */ - for (len = 0; len < 0x2000; ++len) { - uint8_t v1 = cpu_ldub_data(env, s1 + len); - uint8_t v2 = cpu_ldub_data(env, s2 + len); - if (v1 == v2) { - if (v1 == c) { - /* Equal. CC=0, and don't advance the registers. */ - env->cc_op = 0; - env->retxl = s2; - return s1; - } - } else { - /* Unequal. CC={1,2}, and advance the registers. Note that - the terminator need not be zero, but the string that contains - the terminator is by definition "low". */ - env->cc_op = (v1 == c ? 1 : v2 == c ? 2 : v1 < v2 ? 1 : 2); - env->retxl = s2 + len; - return s1 + len; - } - } - - /* CPU-determined bytes equal; advance the registers. */ - env->cc_op = 3; - env->retxl = s2 + len; - return s1 + len; -} - -/* move page */ -void HELPER(mvpg)(CPUS390XState *env, uint64_t r0, uint64_t r1, uint64_t r2) -{ - /* XXX missing r0 handling */ - env->cc_op = 0; - fast_memmove(env, r1, r2, TARGET_PAGE_SIZE); -} - -/* string copy (c is string terminator) */ -uint64_t HELPER(mvst)(CPUS390XState *env, uint64_t c, uint64_t d, uint64_t s) -{ - uint32_t len; - - c = c & 0xff; - d = fix_address(env, d); - s = fix_address(env, s); - - /* Lest we fail to service interrupts in a timely manner, limit the - amount of work we're willing to do. For now, let's cap at 8k. */ - for (len = 0; len < 0x2000; ++len) { - uint8_t v = cpu_ldub_data(env, s + len); - cpu_stb_data(env, d + len, v); - if (v == c) { - /* Complete. Set CC=1 and advance R1. */ - env->cc_op = 1; - env->retxl = s; - return d + len; - } - } - - /* Incomplete. Set CC=3 and signal to advance R1 and R2. */ - env->cc_op = 3; - env->retxl = s + len; - return d + len; -} - -static uint32_t helper_icm(CPUS390XState *env, uint32_t r1, uint64_t address, - uint32_t mask) -{ - int pos = 24; /* top of the lower half of r1 */ - uint64_t rmask = 0xff000000ULL; - uint8_t val = 0; - int ccd = 0; - uint32_t cc = 0; - - while (mask) { - if (mask & 8) { - env->regs[r1] &= ~rmask; - val = cpu_ldub_data(env, address); - if ((val & 0x80) && !ccd) { - cc = 1; - } - ccd = 1; - if (val && cc == 0) { - cc = 2; - } - env->regs[r1] |= (uint64_t)val << pos; - address++; - } - mask = (mask << 1) & 0xf; - pos -= 8; - rmask >>= 8; - } - - return cc; -} - -/* execute instruction - this instruction executes an insn modified with the contents of r1 - it does not change the executed instruction in memory - it does not change the program counter - in other words: tricky... - currently implemented by interpreting the cases it is most commonly used in -*/ -uint32_t HELPER(ex)(CPUS390XState *env, uint32_t cc, uint64_t v1, - uint64_t addr, uint64_t ret) -{ - S390CPU *cpu = s390_env_get_cpu(env); - uint16_t insn = cpu_lduw_code(env, addr); - - HELPER_LOG("%s: v1 0x%lx addr 0x%lx insn 0x%x\n", __func__, v1, addr, - insn); - if ((insn & 0xf0ff) == 0xd000) { - uint32_t l, insn2, b1, b2, d1, d2; - - l = v1 & 0xff; - insn2 = cpu_ldl_code(env, addr + 2); - b1 = (insn2 >> 28) & 0xf; - b2 = (insn2 >> 12) & 0xf; - d1 = (insn2 >> 16) & 0xfff; - d2 = insn2 & 0xfff; - switch (insn & 0xf00) { - case 0x200: - helper_mvc(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0x400: - cc = helper_nc(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0x500: - cc = helper_clc(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0x600: - cc = helper_oc(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0x700: - cc = helper_xc(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0xc00: - helper_tr(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - case 0xd00: - cc = helper_trt(env, l, get_address(env, 0, b1, d1), - get_address(env, 0, b2, d2)); - break; - default: - goto abort; - } - } else if ((insn & 0xff00) == 0x0a00) { - /* supervisor call */ - HELPER_LOG("%s: svc %ld via execute\n", __func__, (insn | v1) & 0xff); - env->psw.addr = ret - 4; - env->int_svc_code = (insn | v1) & 0xff; - env->int_svc_ilen = 4; - helper_exception(env, EXCP_SVC); - } else if ((insn & 0xff00) == 0xbf00) { - uint32_t insn2, r1, r3, b2, d2; - - insn2 = cpu_ldl_code(env, addr + 2); - r1 = (insn2 >> 20) & 0xf; - r3 = (insn2 >> 16) & 0xf; - b2 = (insn2 >> 12) & 0xf; - d2 = insn2 & 0xfff; - cc = helper_icm(env, r1, get_address(env, 0, b2, d2), r3); - } else { - abort: - cpu_abort(CPU(cpu), "EXECUTE on instruction prefix 0x%x not implemented\n", - insn); - } - return cc; -} - -/* load access registers r1 to r3 from memory at a2 */ -void HELPER(lam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - int i; - - for (i = r1;; i = (i + 1) % 16) { - env->aregs[i] = cpu_ldl_data(env, a2); - a2 += 4; - - if (i == r3) { - break; - } - } -} - -/* store access registers r1 to r3 in memory at a2 */ -void HELPER(stam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - int i; - - for (i = r1;; i = (i + 1) % 16) { - cpu_stl_data(env, a2, env->aregs[i]); - a2 += 4; - - if (i == r3) { - break; - } - } -} - -/* move long */ -uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2) -{ - uint64_t destlen = env->regs[r1 + 1] & 0xffffff; - uint64_t dest = get_address_31fix(env, r1); - uint64_t srclen = env->regs[r2 + 1] & 0xffffff; - uint64_t src = get_address_31fix(env, r2); - uint8_t pad = env->regs[r2 + 1] >> 24; - uint8_t v; - uint32_t cc; - - if (destlen == srclen) { - cc = 0; - } else if (destlen < srclen) { - cc = 1; - } else { - cc = 2; - } - - if (srclen > destlen) { - srclen = destlen; - } - - for (; destlen && srclen; src++, dest++, destlen--, srclen--) { - v = cpu_ldub_data(env, src); - cpu_stb_data(env, dest, v); - } - - for (; destlen; dest++, destlen--) { - cpu_stb_data(env, dest, pad); - } - - env->regs[r1 + 1] = destlen; - /* can't use srclen here, we trunc'ed it */ - env->regs[r2 + 1] -= src - env->regs[r2]; - env->regs[r1] = dest; - env->regs[r2] = src; - - return cc; -} - -/* move long extended another memcopy insn with more bells and whistles */ -uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2, - uint32_t r3) -{ - uint64_t destlen = env->regs[r1 + 1]; - uint64_t dest = env->regs[r1]; - uint64_t srclen = env->regs[r3 + 1]; - uint64_t src = env->regs[r3]; - uint8_t pad = a2 & 0xff; - uint8_t v; - uint32_t cc; - - if (!(env->psw.mask & PSW_MASK_64)) { - destlen = (uint32_t)destlen; - srclen = (uint32_t)srclen; - dest &= 0x7fffffff; - src &= 0x7fffffff; - } - - if (destlen == srclen) { - cc = 0; - } else if (destlen < srclen) { - cc = 1; - } else { - cc = 2; - } - - if (srclen > destlen) { - srclen = destlen; - } - - for (; destlen && srclen; src++, dest++, destlen--, srclen--) { - v = cpu_ldub_data(env, src); - cpu_stb_data(env, dest, v); - } - - for (; destlen; dest++, destlen--) { - cpu_stb_data(env, dest, pad); - } - - env->regs[r1 + 1] = destlen; - /* can't use srclen here, we trunc'ed it */ - /* FIXME: 31-bit mode! */ - env->regs[r3 + 1] -= src - env->regs[r3]; - env->regs[r1] = dest; - env->regs[r3] = src; - - return cc; -} - -/* compare logical long extended memcompare insn with padding */ -uint32_t HELPER(clcle)(CPUS390XState *env, uint32_t r1, uint64_t a2, - uint32_t r3) -{ - uint64_t destlen = env->regs[r1 + 1]; - uint64_t dest = get_address_31fix(env, r1); - uint64_t srclen = env->regs[r3 + 1]; - uint64_t src = get_address_31fix(env, r3); - uint8_t pad = a2 & 0xff; - uint8_t v1 = 0, v2 = 0; - uint32_t cc = 0; - - if (!(destlen || srclen)) { - return cc; - } - - if (srclen > destlen) { - srclen = destlen; - } - - for (; destlen || srclen; src++, dest++, destlen--, srclen--) { - v1 = srclen ? cpu_ldub_data(env, src) : pad; - v2 = destlen ? cpu_ldub_data(env, dest) : pad; - if (v1 != v2) { - cc = (v1 < v2) ? 1 : 2; - break; - } - } - - env->regs[r1 + 1] = destlen; - /* can't use srclen here, we trunc'ed it */ - env->regs[r3 + 1] -= src - env->regs[r3]; - env->regs[r1] = dest; - env->regs[r3] = src; - - return cc; -} - -/* checksum */ -uint64_t HELPER(cksm)(CPUS390XState *env, uint64_t r1, - uint64_t src, uint64_t src_len) -{ - uint64_t max_len, len; - uint64_t cksm = (uint32_t)r1; - - /* Lest we fail to service interrupts in a timely manner, limit the - amount of work we're willing to do. For now, let's cap at 8k. */ - max_len = (src_len > 0x2000 ? 0x2000 : src_len); - - /* Process full words as available. */ - for (len = 0; len + 4 <= max_len; len += 4, src += 4) { - cksm += (uint32_t)cpu_ldl_data(env, src); - } - - switch (max_len - len) { - case 1: - cksm += cpu_ldub_data(env, src) << 24; - len += 1; - break; - case 2: - cksm += cpu_lduw_data(env, src) << 16; - len += 2; - break; - case 3: - cksm += cpu_lduw_data(env, src) << 16; - cksm += cpu_ldub_data(env, src + 2) << 8; - len += 3; - break; - } - - /* Fold the carry from the checksum. Note that we can see carry-out - during folding more than once (but probably not more than twice). */ - while (cksm > 0xffffffffull) { - cksm = (uint32_t)cksm + (cksm >> 32); - } - - /* Indicate whether or not we've processed everything. */ - env->cc_op = (len == src_len ? 0 : 3); - - /* Return both cksm and processed length. */ - env->retxl = cksm; - return len; -} - -void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest, - uint64_t src) -{ - int len_dest = len >> 4; - int len_src = len & 0xf; - uint8_t b; - int second_nibble = 0; - - dest += len_dest; - src += len_src; - - /* last byte is special, it only flips the nibbles */ - b = cpu_ldub_data(env, src); - cpu_stb_data(env, dest, (b << 4) | (b >> 4)); - src--; - len_src--; - - /* now pad every nibble with 0xf0 */ - - while (len_dest > 0) { - uint8_t cur_byte = 0; - - if (len_src > 0) { - cur_byte = cpu_ldub_data(env, src); - } - - len_dest--; - dest--; - - /* only advance one nibble at a time */ - if (second_nibble) { - cur_byte >>= 4; - len_src--; - src--; - } - second_nibble = !second_nibble; - - /* digit */ - cur_byte = (cur_byte & 0xf); - /* zone bits */ - cur_byte |= 0xf0; - - cpu_stb_data(env, dest, cur_byte); - } -} - -void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array, - uint64_t trans) -{ - int i; - - for (i = 0; i <= len; i++) { - uint8_t byte = cpu_ldub_data(env, array + i); - uint8_t new_byte = cpu_ldub_data(env, trans + byte); - - cpu_stb_data(env, array + i, new_byte); - } -} - -uint64_t HELPER(tre)(CPUS390XState *env, uint64_t array, - uint64_t len, uint64_t trans) -{ - uint8_t end = env->regs[0] & 0xff; - uint64_t l = len; - uint64_t i; - - if (!(env->psw.mask & PSW_MASK_64)) { - array &= 0x7fffffff; - l = (uint32_t)l; - } - - /* Lest we fail to service interrupts in a timely manner, limit the - amount of work we're willing to do. For now, let's cap at 8k. */ - if (l > 0x2000) { - l = 0x2000; - env->cc_op = 3; - } else { - env->cc_op = 0; - } - - for (i = 0; i < l; i++) { - uint8_t byte, new_byte; - - byte = cpu_ldub_data(env, array + i); - - if (byte == end) { - env->cc_op = 1; - break; - } - - new_byte = cpu_ldub_data(env, trans + byte); - cpu_stb_data(env, array + i, new_byte); - } - - env->retxl = len - i; - return array + i; -} - -uint32_t HELPER(trt)(CPUS390XState *env, uint32_t len, uint64_t array, - uint64_t trans) -{ - uint32_t cc = 0; - int i; - - for (i = 0; i <= len; i++) { - uint8_t byte = cpu_ldub_data(env, array + i); - uint8_t sbyte = cpu_ldub_data(env, trans + byte); - - if (sbyte != 0) { - env->regs[1] = array + i; - env->regs[2] = (env->regs[2] & ~0xff) | sbyte; - cc = (i == len) ? 2 : 1; - break; - } - } - - return cc; -} - -#if !defined(CONFIG_USER_ONLY) -void HELPER(lctlg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - S390CPU *cpu = s390_env_get_cpu(env); - bool PERchanged = false; - int i; - uint64_t src = a2; - uint64_t val; - - for (i = r1;; i = (i + 1) % 16) { - val = cpu_ldq_data(env, src); - if (env->cregs[i] != val && i >= 9 && i <= 11) { - PERchanged = true; - } - env->cregs[i] = val; - HELPER_LOG("load ctl %d from 0x%" PRIx64 " == 0x%" PRIx64 "\n", - i, src, env->cregs[i]); - src += sizeof(uint64_t); - - if (i == r3) { - break; - } - } - - if (PERchanged && env->psw.mask & PSW_MASK_PER) { - s390_cpu_recompute_watchpoints(CPU(cpu)); - } - - tlb_flush(CPU(cpu), 1); -} - -void HELPER(lctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - S390CPU *cpu = s390_env_get_cpu(env); - bool PERchanged = false; - int i; - uint64_t src = a2; - uint32_t val; - - for (i = r1;; i = (i + 1) % 16) { - val = cpu_ldl_data(env, src); - if ((uint32_t)env->cregs[i] != val && i >= 9 && i <= 11) { - PERchanged = true; - } - env->cregs[i] = (env->cregs[i] & 0xFFFFFFFF00000000ULL) | val; - src += sizeof(uint32_t); - - if (i == r3) { - break; - } - } - - if (PERchanged && env->psw.mask & PSW_MASK_PER) { - s390_cpu_recompute_watchpoints(CPU(cpu)); - } - - tlb_flush(CPU(cpu), 1); -} - -void HELPER(stctg)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - int i; - uint64_t dest = a2; - - for (i = r1;; i = (i + 1) % 16) { - cpu_stq_data(env, dest, env->cregs[i]); - dest += sizeof(uint64_t); - - if (i == r3) { - break; - } - } -} - -void HELPER(stctl)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3) -{ - int i; - uint64_t dest = a2; - - for (i = r1;; i = (i + 1) % 16) { - cpu_stl_data(env, dest, env->cregs[i]); - dest += sizeof(uint32_t); - - if (i == r3) { - break; - } - } -} - -uint32_t HELPER(tprot)(uint64_t a1, uint64_t a2) -{ - /* XXX implement */ - - return 0; -} - -/* insert storage key extended */ -uint64_t HELPER(iske)(CPUS390XState *env, uint64_t r2) -{ - static S390SKeysState *ss; - static S390SKeysClass *skeyclass; - uint64_t addr = get_address(env, 0, 0, r2); - uint8_t key; - - if (addr > ram_size) { - return 0; - } - - if (unlikely(!ss)) { - ss = s390_get_skeys_device(); - skeyclass = S390_SKEYS_GET_CLASS(ss); - } - - if (skeyclass->get_skeys(ss, addr / TARGET_PAGE_SIZE, 1, &key)) { - return 0; - } - return key; -} - -/* set storage key extended */ -void HELPER(sske)(CPUS390XState *env, uint64_t r1, uint64_t r2) -{ - static S390SKeysState *ss; - static S390SKeysClass *skeyclass; - uint64_t addr = get_address(env, 0, 0, r2); - uint8_t key; - - if (addr > ram_size) { - return; - } - - if (unlikely(!ss)) { - ss = s390_get_skeys_device(); - skeyclass = S390_SKEYS_GET_CLASS(ss); - } - - key = (uint8_t) r1; - skeyclass->set_skeys(ss, addr / TARGET_PAGE_SIZE, 1, &key); -} - -/* reset reference bit extended */ -uint32_t HELPER(rrbe)(CPUS390XState *env, uint64_t r2) -{ - static S390SKeysState *ss; - static S390SKeysClass *skeyclass; - uint8_t re, key; - - if (r2 > ram_size) { - return 0; - } - - if (unlikely(!ss)) { - ss = s390_get_skeys_device(); - skeyclass = S390_SKEYS_GET_CLASS(ss); - } - - if (skeyclass->get_skeys(ss, r2 / TARGET_PAGE_SIZE, 1, &key)) { - return 0; - } - - re = key & (SK_R | SK_C); - key &= ~SK_R; - - if (skeyclass->set_skeys(ss, r2 / TARGET_PAGE_SIZE, 1, &key)) { - return 0; - } - - /* - * cc - * - * 0 Reference bit zero; change bit zero - * 1 Reference bit zero; change bit one - * 2 Reference bit one; change bit zero - * 3 Reference bit one; change bit one - */ - - return re >> 1; -} - -/* compare and swap and purge */ -uint32_t HELPER(csp)(CPUS390XState *env, uint32_t r1, uint64_t r2) -{ - S390CPU *cpu = s390_env_get_cpu(env); - uint32_t cc; - uint32_t o1 = env->regs[r1]; - uint64_t a2 = r2 & ~3ULL; - uint32_t o2 = cpu_ldl_data(env, a2); - - if (o1 == o2) { - cpu_stl_data(env, a2, env->regs[(r1 + 1) & 15]); - if (r2 & 0x3) { - /* flush TLB / ALB */ - tlb_flush(CPU(cpu), 1); - } - cc = 0; - } else { - env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) | o2; - cc = 1; - } - - return cc; -} - -uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) -{ - int cc = 0, i; - - HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", - __func__, l, a1, a2); - - if (l > 256) { - /* max 256 */ - l = 256; - cc = 3; - } - - /* XXX replace w/ memcpy */ - for (i = 0; i < l; i++) { - cpu_stb_secondary(env, a1 + i, cpu_ldub_primary(env, a2 + i)); - } - - return cc; -} - -uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) -{ - int cc = 0, i; - - HELPER_LOG("%s: %16" PRIx64 " %16" PRIx64 " %16" PRIx64 "\n", - __func__, l, a1, a2); - - if (l > 256) { - /* max 256 */ - l = 256; - cc = 3; - } - - /* XXX replace w/ memcpy */ - for (i = 0; i < l; i++) { - cpu_stb_primary(env, a1 + i, cpu_ldub_secondary(env, a2 + i)); - } - - return cc; -} - -/* invalidate pte */ -void HELPER(ipte)(CPUS390XState *env, uint64_t pte_addr, uint64_t vaddr) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - uint64_t page = vaddr & TARGET_PAGE_MASK; - uint64_t pte = 0; - - /* XXX broadcast to other CPUs */ - - /* XXX Linux is nice enough to give us the exact pte address. - According to spec we'd have to find it out ourselves */ - /* XXX Linux is fine with overwriting the pte, the spec requires - us to only set the invalid bit */ - stq_phys(cs->as, pte_addr, pte | _PAGE_INVALID); - - /* XXX we exploit the fact that Linux passes the exact virtual - address here - it's not obliged to! */ - tlb_flush_page(cs, page); - - /* XXX 31-bit hack */ - if (page & 0x80000000) { - tlb_flush_page(cs, page & ~0x80000000); - } else { - tlb_flush_page(cs, page | 0x80000000); - } -} - -/* flush local tlb */ -void HELPER(ptlb)(CPUS390XState *env) -{ - S390CPU *cpu = s390_env_get_cpu(env); - - tlb_flush(CPU(cpu), 1); -} - -/* load using real address */ -uint64_t HELPER(lura)(CPUS390XState *env, uint64_t addr) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - - return (uint32_t)ldl_phys(cs->as, get_address(env, 0, 0, addr)); -} - -uint64_t HELPER(lurag)(CPUS390XState *env, uint64_t addr) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - - return ldq_phys(cs->as, get_address(env, 0, 0, addr)); -} - -/* store using real address */ -void HELPER(stura)(CPUS390XState *env, uint64_t addr, uint64_t v1) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - - stl_phys(cs->as, get_address(env, 0, 0, addr), (uint32_t)v1); - - if ((env->psw.mask & PSW_MASK_PER) && - (env->cregs[9] & PER_CR9_EVENT_STORE) && - (env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) { - /* PSW is saved just before calling the helper. */ - env->per_address = env->psw.addr; - env->per_perc_atmid = PER_CODE_EVENT_STORE_REAL | get_per_atmid(env); - } -} - -void HELPER(sturg)(CPUS390XState *env, uint64_t addr, uint64_t v1) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - - stq_phys(cs->as, get_address(env, 0, 0, addr), v1); - - if ((env->psw.mask & PSW_MASK_PER) && - (env->cregs[9] & PER_CR9_EVENT_STORE) && - (env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) { - /* PSW is saved just before calling the helper. */ - env->per_address = env->psw.addr; - env->per_perc_atmid = PER_CODE_EVENT_STORE_REAL | get_per_atmid(env); - } -} - -/* load real address */ -uint64_t HELPER(lra)(CPUS390XState *env, uint64_t addr) -{ - CPUState *cs = CPU(s390_env_get_cpu(env)); - uint32_t cc = 0; - int old_exc = cs->exception_index; - uint64_t asc = env->psw.mask & PSW_MASK_ASC; - uint64_t ret; - int flags; - - /* XXX incomplete - has more corner cases */ - if (!(env->psw.mask & PSW_MASK_64) && (addr >> 32)) { - program_interrupt(env, PGM_SPECIAL_OP, 2); - } - - cs->exception_index = old_exc; - if (mmu_translate(env, addr, 0, asc, &ret, &flags, true)) { - cc = 3; - } - if (cs->exception_index == EXCP_PGM) { - ret = env->int_pgm_code | 0x80000000; - } else { - ret |= addr & ~TARGET_PAGE_MASK; - } - cs->exception_index = old_exc; - - env->cc_op = cc; - return ret; -} -#endif |