2 * Miscellaneous PowerPC emulation helpers for QEMU.
4 * Copyright (c) 2003-2007 Jocelyn Mayer
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "exec/exec-all.h"
23 #include "exec/helper-proto.h"
24 #include "qemu/error-report.h"
25 #include "qemu/main-loop.h"
27 #include "helper_regs.h"
29 /*****************************************************************************/
31 void helper_load_dump_spr(CPUPPCState *env, uint32_t sprn)
33 qemu_log("Read SPR %d %03x => " TARGET_FMT_lx "\n", sprn, sprn,
37 void helper_store_dump_spr(CPUPPCState *env, uint32_t sprn)
39 qemu_log("Write SPR %d %03x <= " TARGET_FMT_lx "\n", sprn, sprn,
44 static void raise_fu_exception(CPUPPCState *env, uint32_t bit,
45 uint32_t sprn, uint32_t cause,
48 qemu_log("Facility SPR %d is unavailable (SPR FSCR:%d)\n", sprn, bit);
50 env->spr[SPR_FSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS);
51 cause &= FSCR_IC_MASK;
52 env->spr[SPR_FSCR] |= (target_ulong)cause << FSCR_IC_POS;
54 raise_exception_err_ra(env, POWERPC_EXCP_FU, 0, raddr);
58 void helper_fscr_facility_check(CPUPPCState *env, uint32_t bit,
59 uint32_t sprn, uint32_t cause)
62 if (env->spr[SPR_FSCR] & (1ULL << bit)) {
63 /* Facility is enabled, continue */
66 raise_fu_exception(env, bit, sprn, cause, GETPC());
70 void helper_msr_facility_check(CPUPPCState *env, uint32_t bit,
71 uint32_t sprn, uint32_t cause)
74 if (env->msr & (1ULL << bit)) {
75 /* Facility is enabled, continue */
78 raise_fu_exception(env, bit, sprn, cause, GETPC());
82 #if !defined(CONFIG_USER_ONLY)
84 void helper_store_sdr1(CPUPPCState *env, target_ulong val)
86 if (env->spr[SPR_SDR1] != val) {
87 ppc_store_sdr1(env, val);
88 tlb_flush(env_cpu(env));
92 #if defined(TARGET_PPC64)
93 void helper_store_ptcr(CPUPPCState *env, target_ulong val)
95 if (env->spr[SPR_PTCR] != val) {
96 ppc_store_ptcr(env, val);
97 tlb_flush(env_cpu(env));
101 void helper_store_pcr(CPUPPCState *env, target_ulong value)
103 PowerPCCPU *cpu = env_archcpu(env);
104 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
106 env->spr[SPR_PCR] = value & pcc->pcr_mask;
108 #endif /* defined(TARGET_PPC64) */
110 void helper_store_pidr(CPUPPCState *env, target_ulong val)
112 env->spr[SPR_BOOKS_PID] = val;
113 tlb_flush(env_cpu(env));
116 void helper_store_lpidr(CPUPPCState *env, target_ulong val)
118 env->spr[SPR_LPIDR] = val;
121 * We need to flush the TLB on LPID changes as we only tag HV vs
122 * guest in TCG TLB. Also the quadrants means the HV will
123 * potentially access and cache entries for the current LPID as
126 tlb_flush(env_cpu(env));
129 void helper_store_hid0_601(CPUPPCState *env, target_ulong val)
133 hid0 = env->spr[SPR_HID0];
134 if ((val ^ hid0) & 0x00000008) {
135 /* Change current endianness */
136 env->hflags &= ~(1 << MSR_LE);
137 env->hflags_nmsr &= ~(1 << MSR_LE);
138 env->hflags_nmsr |= (1 << MSR_LE) & (((val >> 3) & 1) << MSR_LE);
139 env->hflags |= env->hflags_nmsr;
140 qemu_log("%s: set endianness to %c => " TARGET_FMT_lx "\n", __func__,
141 val & 0x8 ? 'l' : 'b', env->hflags);
143 env->spr[SPR_HID0] = (uint32_t)val;
146 void helper_store_403_pbr(CPUPPCState *env, uint32_t num, target_ulong value)
148 if (likely(env->pb[num] != value)) {
149 env->pb[num] = value;
150 /* Should be optimized */
151 tlb_flush(env_cpu(env));
155 void helper_store_40x_dbcr0(CPUPPCState *env, target_ulong val)
157 store_40x_dbcr0(env, val);
160 void helper_store_40x_sler(CPUPPCState *env, target_ulong val)
162 store_40x_sler(env, val);
165 /*****************************************************************************/
166 /* PowerPC 601 specific instructions (POWER bridge) */
168 target_ulong helper_clcs(CPUPPCState *env, uint32_t arg)
172 /* Instruction cache line size */
173 return env->icache_line_size;
176 /* Data cache line size */
177 return env->dcache_line_size;
180 /* Minimum cache line size */
181 return (env->icache_line_size < env->dcache_line_size) ?
182 env->icache_line_size : env->dcache_line_size;
185 /* Maximum cache line size */
186 return (env->icache_line_size > env->dcache_line_size) ?
187 env->icache_line_size : env->dcache_line_size;
196 /*****************************************************************************/
197 /* Special registers manipulation */
199 /* GDBstub can read and write MSR... */
200 void ppc_store_msr(CPUPPCState *env, target_ulong value)
202 hreg_store_msr(env, value, 0);
206 * This code is lifted from MacOnLinux. It is called whenever THRM1,2
207 * or 3 is read an fixes up the values in such a way that will make
208 * MacOS not hang. These registers exist on some 75x and 74xx
211 void helper_fixup_thrm(CPUPPCState *env)
216 #define THRM1_TIN (1 << 31)
217 #define THRM1_TIV (1 << 30)
218 #define THRM1_THRES(x) (((x) & 0x7f) << 23)
219 #define THRM1_TID (1 << 2)
220 #define THRM1_TIE (1 << 1)
221 #define THRM1_V (1 << 0)
222 #define THRM3_E (1 << 0)
224 if (!(env->spr[SPR_THRM3] & THRM3_E)) {
228 /* Note: Thermal interrupts are unimplemented */
229 for (i = SPR_THRM1; i <= SPR_THRM2; i++) {
231 if (!(v & THRM1_V)) {
236 t = v & THRM1_THRES(127);
237 if ((v & THRM1_TID) && t < THRM1_THRES(24)) {
240 if (!(v & THRM1_TID) && t > THRM1_THRES(24)) {