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target/ppc: Move "wakeup reset" code to a separate function

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This moves the code to handle waking up from the 0x100 vector
from powerpc_excp() to a separate function, as the former is
already way too big as it is.

No functional change.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20190215161648.9600-5-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2019-02-15 17:16:42 +01:00 • committed by David Gibson
parent 21c0d66a9c
commit dead760b00
1 changed files with 41 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

75
target/ppc/excp_helper.c
View file

@ -65,6 +65,46 @@ static inline void dump_syscall(CPUPPCState *env)
ppc_dump_gpr(env, 6), env->nip); ppc_dump_gpr(env, 6), env->nip);
} }
static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp,
target_ulong *msr)
{
/* We no longer are in a PM state */
env->in_pm_state = false;
/* Pretend to be returning from doze always as we don't lose state */
*msr |= (0x1ull << (63 - 47));
/* Machine checks are sent normally */
if (excp == POWERPC_EXCP_MCHECK) {
return excp;
}
switch (excp) {
case POWERPC_EXCP_RESET:
*msr |= 0x4ull << (63 - 45);
break;
case POWERPC_EXCP_EXTERNAL:
*msr |= 0x8ull << (63 - 45);
break;
case POWERPC_EXCP_DECR:
*msr |= 0x6ull << (63 - 45);
break;
case POWERPC_EXCP_SDOOR:
*msr |= 0x5ull << (63 - 45);
break;
case POWERPC_EXCP_SDOOR_HV:
*msr |= 0x3ull << (63 - 45);
break;
case POWERPC_EXCP_HV_MAINT:
*msr |= 0xaull << (63 - 45);
break;
default:
cpu_abort(cs, "Unsupported exception %d in Power Save mode\n",
excp);
}
return POWERPC_EXCP_RESET;
}
/* Note that this function should be greatly optimized /* Note that this function should be greatly optimized
* when called with a constant excp, from ppc_hw_interrupt * when called with a constant excp, from ppc_hw_interrupt
*/ */
@ -102,40 +142,7 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
* P7/P8/P9 * P7/P8/P9
*/ */
if (env->in_pm_state) { if (env->in_pm_state) {
env->in_pm_state = false; excp = powerpc_reset_wakeup(cs, env, excp, &msr);
/* Pretend to be returning from doze always as we don't lose state */
msr |= (0x1ull << (63 - 47));
/* Non-machine check are routed to 0x100 with a wakeup cause
* encoded in SRR1
*/
if (excp != POWERPC_EXCP_MCHECK) {
switch (excp) {
case POWERPC_EXCP_RESET:
msr |= 0x4ull << (63 - 45);
break;
case POWERPC_EXCP_EXTERNAL:
msr |= 0x8ull << (63 - 45);
break;
case POWERPC_EXCP_DECR:
msr |= 0x6ull << (63 - 45);
break;
case POWERPC_EXCP_SDOOR:
msr |= 0x5ull << (63 - 45);
break;
case POWERPC_EXCP_SDOOR_HV:
msr |= 0x3ull << (63 - 45);
break;
case POWERPC_EXCP_HV_MAINT:
msr |= 0xaull << (63 - 45);
break;
default:
cpu_abort(cs, "Unsupported exception %d in Power Save mode\n",
excp);
}
excp = POWERPC_EXCP_RESET;
}
} }
/* Exception targetting modifiers /* Exception targetting modifiers