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PPC: E500: Implement msgsnd

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This patch implements the msgsnd instruction. It is part of the
Embedded.Processor Control specification and allows one CPU to
IPI another CPU without going through an interrupt controller.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-01-31 03:19:23 +01:00
parent 9e0b5cb1ec
commit d5d11a39a8
3 changed files with 35 additions and 0 deletions
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1
target-ppc/helper.h
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@ -358,6 +358,7 @@ DEF_HELPER_FLAGS_1(load_sr, TCG_CALL_CONST, tl, tl);
DEF_HELPER_FLAGS_2(store_sr, TCG_CALL_CONST, void, tl, tl)
DEF_HELPER_FLAGS_1(602_mfrom, TCG_CALL_CONST | TCG_CALL_PURE, tl, tl)
DEF_HELPER_1(msgsnd, void, tl)
DEF_HELPER_1(msgclr, void, tl)
#endif

18
target-ppc/op_helper.c
View file

@ -4549,4 +4549,22 @@ void helper_msgclr(target_ulong rb)
env->pending_interrupts &= ~(1 << irq);
}
void helper_msgsnd(target_ulong rb)
{
int irq = dbell2irq(rb);
int pir = rb & DBELL_PIRTAG_MASK;
CPUState *cenv;
if (irq < 0) {
return;
}
for (cenv = first_cpu; cenv != NULL; cenv = cenv->next_cpu) {
if ((rb & DBELL_BRDCAST) || (cenv->spr[SPR_BOOKE_PIR] == pir)) {
cenv->pending_interrupts |= 1 << irq;
cpu_interrupt(cenv, CPU_INTERRUPT_HARD);
}
}
}
#endif /* !CONFIG_USER_ONLY */

16
target-ppc/translate.c
View file

@ -6236,6 +6236,20 @@ static void gen_msgclr(DisasContext *ctx)
#endif
}
static void gen_msgsnd(DisasContext *ctx)
{
#if defined(CONFIG_USER_ONLY)
gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC);
#else
if (unlikely(ctx->mem_idx == 0)) {
gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC);
return;
}
gen_helper_msgsnd(cpu_gpr[rB(ctx->opcode)]);
#endif
}
/*** Altivec vector extension ***/
/* Altivec registers moves */
@ -8626,6 +8640,8 @@ GEN_HANDLER2_E(tlbivax_booke206, "tlbivax", 0x1F, 0x12, 0x18, 0x00000001,
PPC_NONE, PPC2_BOOKE206),
GEN_HANDLER2_E(tlbilx_booke206, "tlbilx", 0x1F, 0x12, 0x00, 0x03800001,
PPC_NONE, PPC2_BOOKE206),
GEN_HANDLER2_E(msgsnd, "msgsnd", 0x1F, 0x0E, 0x06, 0x03ff0001,
PPC_NONE, PPC2_PRCNTL),
GEN_HANDLER2_E(msgclr, "msgclr", 0x1F, 0x0E, 0x07, 0x03ff0001,
PPC_NONE, PPC2_PRCNTL),
GEN_HANDLER(wrtee, 0x1F, 0x03, 0x04, 0x000FFC01, PPC_WRTEE),