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/*
* Miscellaneous PowerPC emulation helpers for QEMU.
*
* Copyright (c) 2003-2007 Jocelyn Mayer
*
* 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 2.1 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 "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "mmu-book3s-v3.h"
#include "hw/ppc/ppc.h"
#include "helper_regs.h"
/*****************************************************************************/
/* SPR accesses */
void helper_load_dump_spr(CPUPPCState *env, uint32_t sprn)
{
qemu_log("Read SPR %d %03x => " TARGET_FMT_lx "\n", sprn, sprn,
env->spr[sprn]);
}
void helper_store_dump_spr(CPUPPCState *env, uint32_t sprn)
{
qemu_log("Write SPR %d %03x <= " TARGET_FMT_lx "\n", sprn, sprn,
env->spr[sprn]);
}
void helper_spr_core_write_generic(CPUPPCState *env, uint32_t sprn,
target_ulong val)
{
CPUState *cs = env_cpu(env);
CPUState *ccs;
uint32_t nr_threads = cs->nr_threads;
if (nr_threads == 1) {
env->spr[sprn] = val;
return;
}
THREAD_SIBLING_FOREACH(cs, ccs) {
CPUPPCState *cenv = &POWERPC_CPU(ccs)->env;
cenv->spr[sprn] = val;
}
}
void helper_spr_write_CTRL(CPUPPCState *env, uint32_t sprn,
target_ulong val)
{
CPUState *cs = env_cpu(env);
CPUState *ccs;
uint32_t run = val & 1;
uint32_t ts, ts_mask;
assert(sprn == SPR_CTRL);
env->spr[sprn] &= ~1U;
env->spr[sprn] |= run;
ts_mask = ~(1U << (8 + env->spr[SPR_TIR]));
ts = run << (8 + env->spr[SPR_TIR]);
THREAD_SIBLING_FOREACH(cs, ccs) {
CPUPPCState *cenv = &POWERPC_CPU(ccs)->env;
cenv->spr[sprn] &= ts_mask;
cenv->spr[sprn] |= ts;
}
}
#ifdef TARGET_PPC64
static void raise_hv_fu_exception(CPUPPCState *env, uint32_t bit,
const char *caller, uint32_t cause,
uintptr_t raddr)
{
qemu_log_mask(CPU_LOG_INT, "HV Facility %d is unavailable (%s)\n",
bit, caller);
env->spr[SPR_HFSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS);
raise_exception_err_ra(env, POWERPC_EXCP_HV_FU, cause, raddr);
}
static void raise_fu_exception(CPUPPCState *env, uint32_t bit,
uint32_t sprn, uint32_t cause,
uintptr_t raddr)
{
qemu_log("Facility SPR %d is unavailable (SPR FSCR:%d)\n", sprn, bit);
env->spr[SPR_FSCR] &= ~((target_ulong)FSCR_IC_MASK << FSCR_IC_POS);
cause &= FSCR_IC_MASK;
env->spr[SPR_FSCR] |= (target_ulong)cause << FSCR_IC_POS;
raise_exception_err_ra(env, POWERPC_EXCP_FU, 0, raddr);
}
#endif
void helper_hfscr_facility_check(CPUPPCState *env, uint32_t bit,
const char *caller, uint32_t cause)
{
#ifdef TARGET_PPC64
if ((env->msr_mask & MSR_HVB) && !FIELD_EX64(env->msr, MSR, HV) &&
!(env->spr[SPR_HFSCR] & (1UL << bit))) {
raise_hv_fu_exception(env, bit, caller, cause, GETPC());
}
#endif
}
void helper_fscr_facility_check(CPUPPCState *env, uint32_t bit,
uint32_t sprn, uint32_t cause)
{
#ifdef TARGET_PPC64
if (env->spr[SPR_FSCR] & (1ULL << bit)) {
/* Facility is enabled, continue */
return;
}
raise_fu_exception(env, bit, sprn, cause, GETPC());
#endif
}
void helper_msr_facility_check(CPUPPCState *env, uint32_t bit,
uint32_t sprn, uint32_t cause)
{
#ifdef TARGET_PPC64
if (env->msr & (1ULL << bit)) {
/* Facility is enabled, continue */
return;
}
raise_fu_exception(env, bit, sprn, cause, GETPC());
#endif
}
#if !defined(CONFIG_USER_ONLY)
void helper_store_sdr1(CPUPPCState *env, target_ulong val)
{
if (env->spr[SPR_SDR1] != val) {
ppc_store_sdr1(env, val);
tlb_flush(env_cpu(env));
}
}
#if defined(TARGET_PPC64)
void helper_store_ptcr(CPUPPCState *env, target_ulong val)
{
if (env->spr[SPR_PTCR] != val) {
PowerPCCPU *cpu = env_archcpu(env);
target_ulong ptcr_mask = PTCR_PATB | PTCR_PATS;
target_ulong patbsize = val & PTCR_PATS;
qemu_log_mask(CPU_LOG_MMU, "%s: " TARGET_FMT_lx "\n", __func__, val);
assert(!cpu->vhyp);
assert(env->mmu_model & POWERPC_MMU_3_00);
if (val & ~ptcr_mask) {
error_report("Invalid bits 0x"TARGET_FMT_lx" set in PTCR",
val & ~ptcr_mask);
val &= ptcr_mask;
}
if (patbsize > 24) {
error_report("Invalid Partition Table size 0x" TARGET_FMT_lx
" stored in PTCR", patbsize);
return;
}
env->spr[SPR_PTCR] = val;
tlb_flush(env_cpu(env));
}
}
void helper_store_pcr(CPUPPCState *env, target_ulong value)
{
PowerPCCPU *cpu = env_archcpu(env);
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
env->spr[SPR_PCR] = value & pcc->pcr_mask;
}
void helper_store_ciabr(CPUPPCState *env, target_ulong value)
{
ppc_store_ciabr(env, value);
}
void helper_store_dawr0(CPUPPCState *env, target_ulong value)
{
ppc_store_dawr0(env, value);
}
void helper_store_dawrx0(CPUPPCState *env, target_ulong value)
{
ppc_store_dawrx0(env, value);
}
/*
* DPDES register is shared. Each bit reflects the state of the
* doorbell interrupt of a thread of the same core.
*/
target_ulong helper_load_dpdes(CPUPPCState *env)
{
CPUState *cs = env_cpu(env);
CPUState *ccs;
uint32_t nr_threads = cs->nr_threads;
target_ulong dpdes = 0;
helper_hfscr_facility_check(env, HFSCR_MSGP, "load DPDES", HFSCR_IC_MSGP);
if (!(env->flags & POWERPC_FLAG_SMT_1LPAR)) {
nr_threads = 1; /* DPDES behaves as 1-thread in LPAR-per-thread mode */
}
if (nr_threads == 1) {
if (env->pending_interrupts & PPC_INTERRUPT_DOORBELL) {
dpdes = 1;
}
return dpdes;
}
bql_lock();
THREAD_SIBLING_FOREACH(cs, ccs) {
PowerPCCPU *ccpu = POWERPC_CPU(ccs);
CPUPPCState *cenv = &ccpu->env;
uint32_t thread_id = ppc_cpu_tir(ccpu);
if (cenv->pending_interrupts & PPC_INTERRUPT_DOORBELL) {
dpdes |= (0x1 << thread_id);
}
}
bql_unlock();
return dpdes;
}
void helper_store_dpdes(CPUPPCState *env, target_ulong val)
{
PowerPCCPU *cpu = env_archcpu(env);
CPUState *cs = env_cpu(env);
CPUState *ccs;
uint32_t nr_threads = cs->nr_threads;
helper_hfscr_facility_check(env, HFSCR_MSGP, "store DPDES", HFSCR_IC_MSGP);
if (!(env->flags & POWERPC_FLAG_SMT_1LPAR)) {
nr_threads = 1; /* DPDES behaves as 1-thread in LPAR-per-thread mode */
}
if (val & ~(nr_threads - 1)) {
qemu_log_mask(LOG_GUEST_ERROR, "Invalid DPDES register value "
TARGET_FMT_lx"\n", val);
val &= (nr_threads - 1); /* Ignore the invalid bits */
}
if (nr_threads == 1) {
ppc_set_irq(cpu, PPC_INTERRUPT_DOORBELL, val & 0x1);
return;
}
/* Does iothread need to be locked for walking CPU list? */
bql_lock();
THREAD_SIBLING_FOREACH(cs, ccs) {
PowerPCCPU *ccpu = POWERPC_CPU(ccs);
uint32_t thread_id = ppc_cpu_tir(ccpu);
ppc_set_irq(cpu, PPC_INTERRUPT_DOORBELL, val & (0x1 << thread_id));
}
bql_unlock();
}
#endif /* defined(TARGET_PPC64) */
void helper_store_pidr(CPUPPCState *env, target_ulong val)
{
env->spr[SPR_BOOKS_PID] = (uint32_t)val;
tlb_flush(env_cpu(env));
}
void helper_store_lpidr(CPUPPCState *env, target_ulong val)
{
env->spr[SPR_LPIDR] = (uint32_t)val;
/*
* We need to flush the TLB on LPID changes as we only tag HV vs
* guest in TCG TLB. Also the quadrants means the HV will
* potentially access and cache entries for the current LPID as
* well.
*/
tlb_flush(env_cpu(env));
}
void helper_store_40x_dbcr0(CPUPPCState *env, target_ulong val)
{
/* Bits 26 & 27 affect single-stepping. */
hreg_compute_hflags(env);
/* Bits 28 & 29 affect reset or shutdown. */
store_40x_dbcr0(env, val);
}
void helper_store_40x_sler(CPUPPCState *env, target_ulong val)
{
store_40x_sler(env, val);
}
#endif
/*****************************************************************************/
/* Special registers manipulation */
/*
* This code is lifted from MacOnLinux. It is called whenever THRM1,2
* or 3 is read an fixes up the values in such a way that will make
* MacOS not hang. These registers exist on some 75x and 74xx
* processors.
*/
void helper_fixup_thrm(CPUPPCState *env)
{
target_ulong v, t;
int i;
#define THRM1_TIN (1 << 31)
#define THRM1_TIV (1 << 30)
#define THRM1_THRES(x) (((x) & 0x7f) << 23)
#define THRM1_TID (1 << 2)
#define THRM1_TIE (1 << 1)
#define THRM1_V (1 << 0)
#define THRM3_E (1 << 0)
if (!(env->spr[SPR_THRM3] & THRM3_E)) {
return;
}
/* Note: Thermal interrupts are unimplemented */
for (i = SPR_THRM1; i <= SPR_THRM2; i++) {
v = env->spr[i];
if (!(v & THRM1_V)) {
continue;
}
v |= THRM1_TIV;
v &= ~THRM1_TIN;
t = v & THRM1_THRES(127);
if ((v & THRM1_TID) && t < THRM1_THRES(24)) {
v |= THRM1_TIN;
}
if (!(v & THRM1_TID) && t > THRM1_THRES(24)) {
v |= THRM1_TIN;
}
env->spr[i] = v;
}
}