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PPC: E500: Implement msgsnd 

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
View File

@ -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),