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authorPaul Burton <paul.burton@imgtec.com>2016-02-08 09:46:31 -0800
committerRalf Baechle <ralf@linux-mips.org>2016-02-09 17:18:31 +0100
commit3af5a67c86a30f8cd8bfd6202709be21cedd2756 (patch)
tree77973e56428f7175724477928ad4b3993b607103 /arch/mips
parente6c058f9b2700a720d3fad0f6caad1d030c533ee (diff)
MIPS: Fix early CM probing
Commit c014d164f21d ("MIPS: Add platform callback before initializing the L2 cache") added a platform_early_l2_init function in order to allow platforms to probe for the CM before L2 initialisation is performed, so that CM GCRs are available to mips_sc_probe. That commit actually fails to do anything useful, since it checks mips_cm_revision to determine whether it should call mips_cm_probe but the result of mips_cm_revision will always be 0 until mips_cm_probe has been called. Thus the "early" mips_cm_probe call never occurs. Fix this & drop the useless weak platform_early_l2_init function by simply calling mips_cm_probe from setup_arch. For platforms that don't select CONFIG_MIPS_CM this will be a no-op, and for those that do it removes the requirement for them to call mips_cm_probe manually (although doing so isn't harmful for now). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: Andrzej Hajda <a.hajda@samsung.com> Cc: Aaro Koskinen <aaro.koskinen@nokia.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Rob Herring <robh@kernel.org> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Cc: Jaedon Shin <jaedon.shin@gmail.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Jonas Gorski <jogo@openwrt.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12475/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/kernel/setup.c1
-rw-r--r--arch/mips/mm/sc-mips.c10
-rw-r--r--arch/mips/mti-malta/malta-init.c8
3 files changed, 1 insertions, 18 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 569a7d5242dd..5fdaf8bdcd2e 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -782,6 +782,7 @@ static inline void prefill_possible_map(void) {}
void __init setup_arch(char **cmdline_p)
{
cpu_probe();
+ mips_cm_probe();
prom_init();
setup_early_fdc_console();
diff --git a/arch/mips/mm/sc-mips.c b/arch/mips/mm/sc-mips.c
index 3bd0597d9c3d..249647578e58 100644
--- a/arch/mips/mm/sc-mips.c
+++ b/arch/mips/mm/sc-mips.c
@@ -181,10 +181,6 @@ static int __init mips_sc_probe_cm3(void)
return 1;
}
-void __weak platform_early_l2_init(void)
-{
-}
-
static inline int __init mips_sc_probe(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
@@ -194,12 +190,6 @@ static inline int __init mips_sc_probe(void)
/* Mark as not present until probe completed */
c->scache.flags |= MIPS_CACHE_NOT_PRESENT;
- /*
- * Do we need some platform specific probing before
- * we configure L2?
- */
- platform_early_l2_init();
-
if (mips_cm_revision() >= CM_REV_CM3)
return mips_sc_probe_cm3();
diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c
index 571148c5fd0b..dc2c5214809d 100644
--- a/arch/mips/mti-malta/malta-init.c
+++ b/arch/mips/mti-malta/malta-init.c
@@ -293,7 +293,6 @@ mips_pci_controller:
console_config();
#endif
/* Early detection of CMP support */
- mips_cm_probe();
mips_cpc_probe();
if (!register_cps_smp_ops())
@@ -304,10 +303,3 @@ mips_pci_controller:
return;
register_up_smp_ops();
}
-
-void platform_early_l2_init(void)
-{
- /* L2 configuration lives in the CM3 */
- if (mips_cm_revision() >= CM_REV_CM3)
- mips_cm_probe();
-}