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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 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/exec-all.h"
#include "exec/helper-proto.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]);
}
#ifdef TARGET_PPC64
static void raise_fu_exception(CPUPPCState *env, uint32_t bit,
uint32_t sprn, uint32_t cause)
{
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;
helper_raise_exception_err(env, POWERPC_EXCP_FU, 0);
}
#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);
#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);
#endif
}
#if !defined(CONFIG_USER_ONLY)
void helper_store_sdr1(CPUPPCState *env, target_ulong val)
{
PowerPCCPU *cpu = ppc_env_get_cpu(env);
if (!env->external_htab) {
if (env->spr[SPR_SDR1] != val) {
ppc_store_sdr1(env, val);
tlb_flush(CPU(cpu), 1);
}
}
}
void helper_store_hid0_601(CPUPPCState *env, target_ulong val)
{
target_ulong hid0;
hid0 = env->spr[SPR_HID0];
if ((val ^ hid0) & 0x00000008) {
/* Change current endianness */
env->hflags &= ~(1 << MSR_LE);
env->hflags_nmsr &= ~(1 << MSR_LE);
env->hflags_nmsr |= (1 << MSR_LE) & (((val >> 3) & 1) << MSR_LE);
env->hflags |= env->hflags_nmsr;
qemu_log("%s: set endianness to %c => " TARGET_FMT_lx "\n", __func__,
val & 0x8 ? 'l' : 'b', env->hflags);
}
env->spr[SPR_HID0] = (uint32_t)val;
}
void helper_store_403_pbr(CPUPPCState *env, uint32_t num, target_ulong value)
{
PowerPCCPU *cpu = ppc_env_get_cpu(env);
if (likely(env->pb[num] != value)) {
env->pb[num] = value;
/* Should be optimized */
tlb_flush(CPU(cpu), 1);
}
}
void helper_store_40x_dbcr0(CPUPPCState *env, target_ulong val)
{
store_40x_dbcr0(env, val);
}
void helper_store_40x_sler(CPUPPCState *env, target_ulong val)
{
store_40x_sler(env, val);
}
#endif
/*****************************************************************************/
/* PowerPC 601 specific instructions (POWER bridge) */
target_ulong helper_clcs(CPUPPCState *env, uint32_t arg)
{
switch (arg) {
case 0x0CUL:
/* Instruction cache line size */
return env->icache_line_size;
break;
case 0x0DUL:
/* Data cache line size */
return env->dcache_line_size;
break;
case 0x0EUL:
/* Minimum cache line size */
return (env->icache_line_size < env->dcache_line_size) ?
env->icache_line_size : env->dcache_line_size;
break;
case 0x0FUL:
/* Maximum cache line size */
return (env->icache_line_size > env->dcache_line_size) ?
env->icache_line_size : env->dcache_line_size;
break;
default:
/* Undefined */
return 0;
break;
}
}
/*****************************************************************************/
/* Special registers manipulation */
/* GDBstub can read and write MSR... */
void ppc_store_msr(CPUPPCState *env, target_ulong value)
{
hreg_store_msr(env, value, 0);
}
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