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From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Cc: Peter Mamonov <pmamonov@gmail.com>
Subject: [PATCH 06/15] MIPS: flush cache on shutdown
Date: Mon,  7 Mar 2016 16:30:17 +0300	[thread overview]
Message-ID: <1457357426-9868-7-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1457357426-9868-1-git-send-email-antonynpavlov@gmail.com>

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
---
 arch/mips/include/asm/cache.h |  6 ++++++
 arch/mips/lib/Makefile        |  1 +
 arch/mips/lib/c-r4k.c         | 23 +++++++++++++++++++++++
 arch/mips/lib/shutdown.c      | 12 ++++++++++++
 4 files changed, 42 insertions(+)

diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h
new file mode 100644
index 0000000..cceba0a
--- /dev/null
+++ b/arch/mips/include/asm/cache.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_MIPS_CACHE_H
+#define _ASM_MIPS_CACHE_H
+
+void flush_cache_all(void);
+
+#endif /* _ASM_MIPS_CACHE_H */
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 02ee189..43f7af7 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -6,6 +6,7 @@ obj-y += ashrdi3.o
 obj-y += cpu-probe.o
 obj-y += traps.o
 obj-y += genex.o
+obj-y += shutdown.o
 
 obj-$(CONFIG_MIPS_OPTIMIZED_STRING_FUNCTIONS) += memcpy.o
 obj-$(CONFIG_MIPS_OPTIMIZED_STRING_FUNCTIONS) += memset.o
diff --git a/arch/mips/lib/c-r4k.c b/arch/mips/lib/c-r4k.c
index 4fe046a..1502058 100644
--- a/arch/mips/lib/c-r4k.c
+++ b/arch/mips/lib/c-r4k.c
@@ -48,6 +48,29 @@ static inline void blast_##pfx##cache##_range(unsigned long start,	\
 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D)
 __BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D)
 
+void flush_cache_all(void)
+{
+	struct cpuinfo_mips *c = &current_cpu_data;
+	unsigned long lsize;
+	unsigned long addr;
+	unsigned long aend;
+	unsigned int icache_size, dcache_size;
+
+	dcache_size = c->dcache.waysize * c->dcache.ways;
+	lsize = c->dcache.linesz;
+	aend = (KSEG0 + dcache_size - 1) & ~(lsize - 1);
+	for (addr = KSEG0; addr <= aend; addr += lsize)
+		cache_op(Index_Writeback_Inv_D, addr);
+
+	icache_size = c->icache.waysize * c->icache.ways;
+	lsize = c->icache.linesz;
+	aend = (KSEG0 + icache_size - 1) & ~(lsize - 1);
+	for (addr = KSEG0; addr <= aend; addr += lsize)
+		cache_op(Index_Invalidate_I, addr);
+
+	/* secondatory cache skipped */
+}
+
 void dma_flush_range(unsigned long start, unsigned long end)
 {
 	blast_dcache_range(start, end);
diff --git a/arch/mips/lib/shutdown.c b/arch/mips/lib/shutdown.c
new file mode 100644
index 0000000..973cd23
--- /dev/null
+++ b/arch/mips/lib/shutdown.c
@@ -0,0 +1,12 @@
+/**
+ * This function is called by shutdown_barebox to get a clean
+ * memory/cache state.
+ */
+#include <init.h>
+#include <asm/cache.h>
+
+static void arch_shutdown(void)
+{
+	flush_cache_all();
+}
+archshutdown_exitcall(arch_shutdown);
-- 
2.7.0


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  parent reply	other threads:[~2016-03-07 13:31 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-07 13:30 [PATCH 00/15] MIPS: ar9331: use cache and fix gpio Antony Pavlov
2016-03-07 13:30 ` [PATCH 01/15] MIPS: probe_scache(): use MIPS_CONF_M linux kernel macro Antony Pavlov
2016-03-07 13:30 ` [PATCH 02/15] MIPS: pbl: import cache init code from U-Boot v2016.01-212-ga3ab2ae Antony Pavlov
2016-03-07 13:30 ` [PATCH 03/15] MIPS: black-swift: pbl: init cache Antony Pavlov
2016-03-07 13:30 ` [PATCH 04/15] MIPS: tplink-mr3020: " Antony Pavlov
2016-03-07 13:30 ` [PATCH 05/15] MIPS: add initial R4000-style cache support Antony Pavlov
2016-03-09 13:28   ` Sascha Hauer
2016-03-09 14:23     ` Antony Pavlov
2016-03-09 16:12       ` Antony Pavlov
2016-03-10  8:44         ` Sascha Hauer
2016-03-07 13:30 ` Antony Pavlov [this message]
2016-03-07 13:30 ` [PATCH 07/15] MIPS: implement dma_sync_* functions Antony Pavlov
2016-03-07 13:30 ` [PATCH 08/15] MIPS: dtb: register only one memory bank Antony Pavlov
2016-03-07 13:30 ` [PATCH 09/15] MIPS: tplink-mr3020_defconfig: use cached memory region Antony Pavlov
2016-03-07 13:30 ` [PATCH 10/15] MIPS: black-swift_defconfig: " Antony Pavlov
2016-03-07 13:30 ` [PATCH 11/15] MIPS: ath79: pbl: add pbl_ar9331_mdio_gpio_enable macro Antony Pavlov
2016-03-07 13:30 ` [PATCH 12/15] MIPS: black-swift: enable GPIO LED Antony Pavlov
2016-03-07 13:30 ` [PATCH 13/15] MIPS: black-swift: enable GPIO key Antony Pavlov
2016-03-07 13:30 ` [PATCH 14/15] MIPS: black-swift_defconfig: enable gpio-related stuff Antony Pavlov
2016-03-07 13:30 ` [PATCH 15/15] MIPS: tplink-mr3020: fix "WPS" and "3G" LEDs Antony Pavlov
2016-03-09  7:31 ` [PATCH 00/15] MIPS: ar9331: use cache and fix gpio Sascha Hauer
2016-03-09  8:45   ` Yegor Yefremov
2016-03-09 10:34     ` Antony Pavlov

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