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powerpc/xics: Rewrite XICS driver

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This is a significant rework of the XICS driver, too significant to
conveniently break it up into a series of smaller patches to be honest.

The driver is moved to a more generic location to allow new platforms
to use it, and is broken up into separate ICP and ICS "backends". For
now we have the native and "hypervisor" ICP backends and one common
RTAS ICS backend.

The driver supports one ICP backend instanciation, and many ICS ones,
in order to accomodate future platforms with multiple possibly different
interrupt "sources" mechanisms.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2011-04-04 13:46:58 +10:00
parent f0e615c3cb
commit 0b05ac6e24
19 changed files with 1377 additions and 1017 deletions
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17
arch/powerpc/platforms/pseries/smp.c
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@@ -44,10 +44,11 @@
#include <asm/mpic.h>
#include <asm/vdso_datapage.h>
#include <asm/cputhreads.h>
#include <asm/mpic.h>
#include <asm/xics.h>
#include "plpar_wrappers.h"
#include "pseries.h"
#include "xics.h"
#include "offline_states.h"
@@ -136,7 +137,6 @@ out:
return 1;
}
#ifdef CONFIG_XICS
static void __devinit smp_xics_setup_cpu(int cpu)
{
if (cpu != boot_cpuid)
@@ -151,7 +151,6 @@ static void __devinit smp_xics_setup_cpu(int cpu)
set_default_offline_state(cpu);
#endif
}
#endif /* CONFIG_XICS */
static void __devinit smp_pSeries_kick_cpu(int nr)
{
@@ -197,23 +196,21 @@ static int smp_pSeries_cpu_bootable(unsigned int nr)
return 1;
}
#ifdef CONFIG_MPIC
static struct smp_ops_t pSeries_mpic_smp_ops = {
.message_pass = smp_mpic_message_pass,
.probe = smp_mpic_probe,
.kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_mpic_setup_cpu,
};
#endif
#ifdef CONFIG_XICS
static struct smp_ops_t pSeries_xics_smp_ops = {
.message_pass = smp_xics_message_pass,
.probe = smp_xics_probe,
.message_pass = NULL, /* Filled at runtime by xics_smp_probe() */
.probe = xics_smp_probe,
.kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_xics_setup_cpu,
.cpu_bootable = smp_pSeries_cpu_bootable,
};
#endif
/* This is called very early */
static void __init smp_init_pseries(void)
@@ -245,14 +242,12 @@ static void __init smp_init_pseries(void)
pr_debug(" <- smp_init_pSeries()\n");
}
#ifdef CONFIG_MPIC
void __init smp_init_pseries_mpic(void)
{
smp_ops = &pSeries_mpic_smp_ops;
smp_init_pseries();
}
#endif
void __init smp_init_pseries_xics(void)
{