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target/ppc: Introduce powerpc_excp_74xx

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Introduce a new powerpc_excp function specific for PowerPC 74xx
CPUs. This commit copies powerpc_excp_legacy verbatim so the next one
has a clean diff.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220127201116.1154733-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Fabiano Rosas 2022-01-28 13:15:06 +01:00 committed by Cédric Le Goater
parent aca2b93fd7
commit 52926b0deb
1 changed files with 474 additions and 0 deletions
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474
target/ppc/excp_helper.c
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@ -551,6 +551,477 @@ static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)
powerpc_set_excp_state(cpu, vector, new_msr);
}
static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
{
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
int excp_model = env->excp_model;
target_ulong msr, new_msr, vector;
int srr0, srr1, lev = -1;
if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) {
cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp);
}
qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx
" => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp),
excp, env->error_code);
/* new srr1 value excluding must-be-zero bits */
if (excp_model == POWERPC_EXCP_BOOKE) {
msr = env->msr;
} else {
msr = env->msr & ~0x783f0000ULL;
}
/*
* new interrupt handler msr preserves existing HV and ME unless
* explicitly overriden
*/
new_msr = env->msr & (((target_ulong)1 << MSR_ME) | MSR_HVB);
/* target registers */
srr0 = SPR_SRR0;
srr1 = SPR_SRR1;
/*
* check for special resume at 0x100 from doze/nap/sleep/winkle on
* P7/P8/P9
*/
if (env->resume_as_sreset) {
excp = powerpc_reset_wakeup(cs, env, excp, &msr);
}
/*
* Hypervisor emulation assistance interrupt only exists on server
* arch 2.05 server or later. We also don't want to generate it if
* we don't have HVB in msr_mask (PAPR mode).
*/
if (excp == POWERPC_EXCP_HV_EMU
#if defined(TARGET_PPC64)
&& !(mmu_is_64bit(env->mmu_model) && (env->msr_mask & MSR_HVB))
#endif /* defined(TARGET_PPC64) */
) {
excp = POWERPC_EXCP_PROGRAM;
}
#ifdef TARGET_PPC64
/*
* SPEU and VPU share the same IVOR but they exist in different
* processors. SPEU is e500v1/2 only and VPU is e6500 only.
*/
if (excp_model == POWERPC_EXCP_BOOKE && excp == POWERPC_EXCP_VPU) {
excp = POWERPC_EXCP_SPEU;
}
#endif
vector = env->excp_vectors[excp];
if (vector == (target_ulong)-1ULL) {
cpu_abort(cs, "Raised an exception without defined vector %d\n",
excp);
}
vector |= env->excp_prefix;
switch (excp) {
case POWERPC_EXCP_CRITICAL: /* Critical input */
switch (excp_model) {
case POWERPC_EXCP_40x:
srr0 = SPR_40x_SRR2;
srr1 = SPR_40x_SRR3;
break;
case POWERPC_EXCP_BOOKE:
srr0 = SPR_BOOKE_CSRR0;
srr1 = SPR_BOOKE_CSRR1;
break;
case POWERPC_EXCP_G2:
break;
default:
goto excp_invalid;
}
break;
case POWERPC_EXCP_MCHECK: /* Machine check exception */
if (msr_me == 0) {
/*
* Machine check exception is not enabled. Enter
* checkstop state.
*/
fprintf(stderr, "Machine check while not allowed. "
"Entering checkstop state\n");
if (qemu_log_separate()) {
qemu_log("Machine check while not allowed. "
"Entering checkstop state\n");
}
cs->halted = 1;
cpu_interrupt_exittb(cs);
}
if (env->msr_mask & MSR_HVB) {
/*
* ISA specifies HV, but can be delivered to guest with HV
* clear (e.g., see FWNMI in PAPR).
*/
new_msr |= (target_ulong)MSR_HVB;
}
/* machine check exceptions don't have ME set */
new_msr &= ~((target_ulong)1 << MSR_ME);
/* XXX: should also have something loaded in DAR / DSISR */
switch (excp_model) {
case POWERPC_EXCP_40x:
srr0 = SPR_40x_SRR2;
srr1 = SPR_40x_SRR3;
break;
case POWERPC_EXCP_BOOKE:
/* FIXME: choose one or the other based on CPU type */
srr0 = SPR_BOOKE_MCSRR0;
srr1 = SPR_BOOKE_MCSRR1;
env->spr[SPR_BOOKE_CSRR0] = env->nip;
env->spr[SPR_BOOKE_CSRR1] = msr;
break;
default:
break;
}
break;
case POWERPC_EXCP_DSI: /* Data storage exception */
trace_ppc_excp_dsi(env->spr[SPR_DSISR], env->spr[SPR_DAR]);
break;
case POWERPC_EXCP_ISI: /* Instruction storage exception */
trace_ppc_excp_isi(msr, env->nip);
msr |= env->error_code;
break;
case POWERPC_EXCP_EXTERNAL: /* External input */
{
bool lpes0;
cs = CPU(cpu);
/*
* Exception targeting modifiers
*
* LPES0 is supported on POWER7/8/9
* LPES1 is not supported (old iSeries mode)
*
* On anything else, we behave as if LPES0 is 1
* (externals don't alter MSR:HV)
*/
#if defined(TARGET_PPC64)
if (excp_model == POWERPC_EXCP_POWER7 ||
excp_model == POWERPC_EXCP_POWER8 ||
excp_model == POWERPC_EXCP_POWER9 ||
excp_model == POWERPC_EXCP_POWER10) {
lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0);
} else
#endif /* defined(TARGET_PPC64) */
{
lpes0 = true;
}
if (!lpes0) {
new_msr |= (target_ulong)MSR_HVB;
new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
srr0 = SPR_HSRR0;
srr1 = SPR_HSRR1;
}
if (env->mpic_proxy) {
/* IACK the IRQ on delivery */
env->spr[SPR_BOOKE_EPR] = ldl_phys(cs->as, env->mpic_iack);
}
break;
}
case POWERPC_EXCP_ALIGN: /* Alignment exception */
/* Get rS/rD and rA from faulting opcode */
/*
* Note: the opcode fields will not be set properly for a
* direct store load/store, but nobody cares as nobody
* actually uses direct store segments.
*/
env->spr[SPR_DSISR] |= (env->error_code & 0x03FF0000) >> 16;
break;
case POWERPC_EXCP_PROGRAM: /* Program exception */
switch (env->error_code & ~0xF) {
case POWERPC_EXCP_FP:
if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) {
trace_ppc_excp_fp_ignore();
cs->exception_index = POWERPC_EXCP_NONE;
env->error_code = 0;
return;
}
/*
* FP exceptions always have NIP pointing to the faulting
* instruction, so always use store_next and claim we are
* precise in the MSR.
*/
msr |= 0x00100000;
env->spr[SPR_BOOKE_ESR] = ESR_FP;
break;
case POWERPC_EXCP_INVAL:
trace_ppc_excp_inval(env->nip);
msr |= 0x00080000;
env->spr[SPR_BOOKE_ESR] = ESR_PIL;
break;
case POWERPC_EXCP_PRIV:
msr |= 0x00040000;
env->spr[SPR_BOOKE_ESR] = ESR_PPR;
break;
case POWERPC_EXCP_TRAP:
msr |= 0x00020000;
env->spr[SPR_BOOKE_ESR] = ESR_PTR;
break;
default:
/* Should never occur */
cpu_abort(cs, "Invalid program exception %d. Aborting\n",
env->error_code);
break;
}
break;
case POWERPC_EXCP_SYSCALL: /* System call exception */
lev = env->error_code;
if ((lev == 1) && cpu->vhyp) {
dump_hcall(env);
} else {
dump_syscall(env);
}
/*
* We need to correct the NIP which in this case is supposed
* to point to the next instruction
*/
env->nip += 4;
/* "PAPR mode" built-in hypercall emulation */
if ((lev == 1) && cpu->vhyp) {
PPCVirtualHypervisorClass *vhc =
PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);
vhc->hypercall(cpu->vhyp, cpu);
return;
}
if (lev == 1) {
new_msr |= (target_ulong)MSR_HVB;
}
break;
case POWERPC_EXCP_SYSCALL_VECTORED: /* scv exception */
lev = env->error_code;
dump_syscall(env);
env->nip += 4;
new_msr |= env->msr & ((target_ulong)1 << MSR_EE);
new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
vector += lev * 0x20;
env->lr = env->nip;
env->ctr = msr;
break;
case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
case POWERPC_EXCP_DECR: /* Decrementer exception */
break;
case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
/* FIT on 4xx */
trace_ppc_excp_print("FIT");
break;
case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
trace_ppc_excp_print("WDT");
switch (excp_model) {
case POWERPC_EXCP_BOOKE:
srr0 = SPR_BOOKE_CSRR0;
srr1 = SPR_BOOKE_CSRR1;
break;
default:
break;
}
break;
case POWERPC_EXCP_DTLB: /* Data TLB error */
case POWERPC_EXCP_ITLB: /* Instruction TLB error */
break;
case POWERPC_EXCP_DEBUG: /* Debug interrupt */
if (env->flags & POWERPC_FLAG_DE) {
/* FIXME: choose one or the other based on CPU type */
srr0 = SPR_BOOKE_DSRR0;
srr1 = SPR_BOOKE_DSRR1;
env->spr[SPR_BOOKE_CSRR0] = env->nip;
env->spr[SPR_BOOKE_CSRR1] = msr;
/* DBSR already modified by caller */
} else {
cpu_abort(cs, "Debug exception triggered on unsupported model\n");
}
break;
case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavailable/VPU */
env->spr[SPR_BOOKE_ESR] = ESR_SPV;
break;
case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
break;
case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
srr0 = SPR_BOOKE_CSRR0;
srr1 = SPR_BOOKE_CSRR1;
break;
case POWERPC_EXCP_RESET: /* System reset exception */
/* A power-saving exception sets ME, otherwise it is unchanged */
if (msr_pow) {
/* indicate that we resumed from power save mode */
msr |= 0x10000;
new_msr |= ((target_ulong)1 << MSR_ME);
}
if (env->msr_mask & MSR_HVB) {
/*
* ISA specifies HV, but can be delivered to guest with HV
* clear (e.g., see FWNMI in PAPR, NMI injection in QEMU).
*/
new_msr |= (target_ulong)MSR_HVB;
} else {
if (msr_pow) {
cpu_abort(cs, "Trying to deliver power-saving system reset "
"exception %d with no HV support\n", excp);
}
}
break;
case POWERPC_EXCP_DSEG: /* Data segment exception */
case POWERPC_EXCP_ISEG: /* Instruction segment exception */
case POWERPC_EXCP_TRACE: /* Trace exception */
break;
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */
msr |= env->error_code;
/* fall through */
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment exception */
case POWERPC_EXCP_SDOOR_HV: /* Hypervisor Doorbell interrupt */
case POWERPC_EXCP_HV_EMU:
case POWERPC_EXCP_HVIRT: /* Hypervisor virtualization */
srr0 = SPR_HSRR0;
srr1 = SPR_HSRR1;
new_msr |= (target_ulong)MSR_HVB;
new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
break;
case POWERPC_EXCP_VPU: /* Vector unavailable exception */
case POWERPC_EXCP_VSXU: /* VSX unavailable exception */
case POWERPC_EXCP_FU: /* Facility unavailable exception */
#ifdef TARGET_PPC64
env->spr[SPR_FSCR] |= ((target_ulong)env->error_code << 56);
#endif
break;
case POWERPC_EXCP_HV_FU: /* Hypervisor Facility Unavailable Exception */
#ifdef TARGET_PPC64
env->spr[SPR_HFSCR] |= ((target_ulong)env->error_code << FSCR_IC_POS);
srr0 = SPR_HSRR0;
srr1 = SPR_HSRR1;
new_msr |= (target_ulong)MSR_HVB;
new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
#endif
break;
case POWERPC_EXCP_PIT: /* Programmable interval timer interrupt */
trace_ppc_excp_print("PIT");
break;
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
switch (excp_model) {
case POWERPC_EXCP_602:
case POWERPC_EXCP_603:
case POWERPC_EXCP_G2:
/* Swap temporary saved registers with GPRs */
if (!(new_msr & ((target_ulong)1 << MSR_TGPR))) {
new_msr |= (target_ulong)1 << MSR_TGPR;
hreg_swap_gpr_tgpr(env);
}
/* fall through */
case POWERPC_EXCP_7x5:
ppc_excp_debug_sw_tlb(env, excp);
msr |= env->crf[0] << 28;
msr |= env->error_code; /* key, D/I, S/L bits */
/* Set way using a LRU mechanism */
msr |= ((env->last_way + 1) & (env->nb_ways - 1)) << 17;
break;
default:
cpu_abort(cs, "Invalid TLB miss exception\n");
break;
}
break;
case POWERPC_EXCP_EFPDI: /* Embedded floating-point data interrupt */
case POWERPC_EXCP_EFPRI: /* Embedded floating-point round interrupt */
case POWERPC_EXCP_EPERFM: /* Embedded performance monitor interrupt */
case POWERPC_EXCP_IO: /* IO error exception */
case POWERPC_EXCP_RUNM: /* Run mode exception */
case POWERPC_EXCP_EMUL: /* Emulation trap exception */
case POWERPC_EXCP_FPA: /* Floating-point assist exception */
case POWERPC_EXCP_DABR: /* Data address breakpoint */
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
case POWERPC_EXCP_SMI: /* System management interrupt */
case POWERPC_EXCP_THERM: /* Thermal interrupt */
case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */
case POWERPC_EXCP_VPUA: /* Vector assist exception */
case POWERPC_EXCP_SOFTP: /* Soft patch exception */
case POWERPC_EXCP_MAINT: /* Maintenance exception */
case POWERPC_EXCP_MEXTBR: /* Maskable external breakpoint */
case POWERPC_EXCP_NMEXTBR: /* Non maskable external breakpoint */
cpu_abort(cs, "%s exception not implemented\n",
powerpc_excp_name(excp));
break;
default:
excp_invalid:
cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp);
break;
}
/* Sanity check */
if (!(env->msr_mask & MSR_HVB)) {
if (new_msr & MSR_HVB) {
cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with "
"no HV support\n", excp);
}
if (srr0 == SPR_HSRR0) {
cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with "
"no HV support\n", excp);
}
}
/*
* Sort out endianness of interrupt, this differs depending on the
* CPU, the HV mode, etc...
*/
if (ppc_interrupts_little_endian(cpu, !!(new_msr & MSR_HVB))) {
new_msr |= (target_ulong)1 << MSR_LE;
}
#if defined(TARGET_PPC64)
if (excp_model == POWERPC_EXCP_BOOKE) {
if (env->spr[SPR_BOOKE_EPCR] & EPCR_ICM) {
/* Cat.64-bit: EPCR.ICM is copied to MSR.CM */
new_msr |= (target_ulong)1 << MSR_CM;
} else {
vector = (uint32_t)vector;
}
} else {
if (!msr_isf && !mmu_is_64bit(env->mmu_model)) {
vector = (uint32_t)vector;
} else {
new_msr |= (target_ulong)1 << MSR_SF;
}
}
#endif
if (excp != POWERPC_EXCP_SYSCALL_VECTORED) {
/* Save PC */
env->spr[srr0] = env->nip;
/* Save MSR */
env->spr[srr1] = msr;
}
/* This can update new_msr and vector if AIL applies */
ppc_excp_apply_ail(cpu, excp_model, excp, msr, &new_msr, &vector);
powerpc_set_excp_state(cpu, vector, new_msr);
}
#ifdef TARGET_PPC64
static void powerpc_excp_books(PowerPCCPU *cpu, int excp)
{
@ -1335,6 +1806,9 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp)
case POWERPC_EXCP_40x:
powerpc_excp_40x(cpu, excp);
break;
case POWERPC_EXCP_74xx:
powerpc_excp_74xx(cpu, excp);
break;
case POWERPC_EXCP_970:
case POWERPC_EXCP_POWER7:
case POWERPC_EXCP_POWER8: