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From: Kyle McMartin <kmcmartin@redhat.com>
Date: Tue, 30 Sep 2014 16:19:47 -0400
Subject: [PATCH] arm: highbank l2 reverts
Revert some v3.16 changes to mach-highbank which broke L2 cache enablement.
Will debug upstream separately, but we need F22/21 running there. (#1139762)
---
arch/arm/mach-highbank/highbank.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index 8c35ae4ff176..38e1dc3b4c6e 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -51,13 +51,11 @@ static void __init highbank_scu_map_io(void)
}
-static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
+static void highbank_l2x0_disable(void)
{
- if (reg == L2X0_CTRL)
- highbank_smc1(0x102, val);
- else
- WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
- reg);
+ outer_flush_all();
+ /* Disable PL310 L2 Cache controller */
+ highbank_smc1(0x102, 0x0);
}
static void __init highbank_init_irq(void)
@@ -66,6 +64,14 @@ static void __init highbank_init_irq(void)
if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
highbank_scu_map_io();
+
+ /* Enable PL310 L2 Cache controller */
+ if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
+ of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
+ highbank_smc1(0x102, 0x1);
+ l2x0_of_init(0, ~0);
+ outer_cache.disable = highbank_l2x0_disable;
+ }
}
static void highbank_power_off(void)
@@ -179,9 +185,6 @@ DT_MACHINE_START(HIGHBANK, "Highbank")
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
.dma_zone_size = (4ULL * SZ_1G),
#endif
- .l2c_aux_val = 0,
- .l2c_aux_mask = ~0,
- .l2c_write_sec = highbank_l2c310_write_sec,
.init_irq = highbank_init_irq,
.init_machine = highbank_init,
.dt_compat = highbank_match,
--
1.9.3
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