--- /dev/null
+/*
+ * 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 "cpu.h"
+#include "exec/helper-proto.h"
+#include "exec/cpu_ldst.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);
+
+ 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);
+
+ 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)
+{
+ uint64_t addr = get_address(env, 0, 0, r2);
+
+ if (addr > ram_size) {
+ return 0;
+ }
+
+ return env->storage_keys[addr / TARGET_PAGE_SIZE];
+}
+
+/* set storage key extended */
+void HELPER(sske)(CPUS390XState *env, uint64_t r1, uint64_t r2)
+{
+ uint64_t addr = get_address(env, 0, 0, r2);
+
+ if (addr > ram_size) {
+ return;
+ }
+
+ env->storage_keys[addr / TARGET_PAGE_SIZE] = r1;
+}
+
+/* reset reference bit extended */
+uint32_t HELPER(rrbe)(CPUS390XState *env, uint64_t r2)
+{
+ uint8_t re;
+ uint8_t key;
+
+ if (r2 > ram_size) {
+ return 0;
+ }
+
+ key = env->storage_keys[r2 / TARGET_PAGE_SIZE];
+ re = key & (SK_R | SK_C);
+ env->storage_keys[r2 / TARGET_PAGE_SIZE] = (key & ~SK_R);
+
+ /*
+ * 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
Code Review / kvmfornfv.git / blobdiff