diff options
Diffstat (limited to 'target/s390x/mem_helper.c')
| -rw-r--r-- | target/s390x/mem_helper.c | 1202 |
1 files changed, 1202 insertions, 0 deletions
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c new file mode 100644 index 0000000000..99bc5e2834 --- /dev/null +++ b/target/s390x/mem_helper.c @@ -0,0 +1,1202 @@ +/* + * 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/exec-all.h" +#include "exec/cpu_ldst.h" + +#if !defined(CONFIG_USER_ONLY) +#include "hw/s390x/storage-keys.h" +#endif + +/*****************************************************************************/ +/* 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, MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr) +{ + int ret; + + ret = s390_cpu_handle_mmu_fault(cs, addr, access_type, 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 |