Provide a function plat_mem_fixup() that is called after memory
command line args are parsed. This can be used to fixup memory
regions including those passed thru device tree and command line.
In XLR/XLP, use this to reduce the size of the memory segments so
that prefetch will not access illegal addresses.
Signed-off-by: Jayachandran C <jchandra@xxxxxxxxxxxx>
---
arch/mips/kernel/setup.c | 4 +++
arch/mips/netlogic/common/Makefile | 1 +
arch/mips/netlogic/common/memory.c | 53 ++++++++++++++++++++++++++++++++++++++
arch/mips/netlogic/xlp/setup.c | 14 ----------
arch/mips/netlogic/xlr/setup.c | 3 +--
5 files changed, 59 insertions(+), 16 deletions(-)
create mode 100644 arch/mips/netlogic/common/memory.c
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 0589290..d995904 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -614,6 +614,7 @@ static void __init arch_mem_init(char **cmdline_p)
{
struct memblock_region *reg;
extern void plat_mem_setup(void);
+ extern void plat_mem_fixup(void);
/* call board setup routine */
plat_mem_setup();
@@ -657,6 +658,9 @@ static void __init arch_mem_init(char **cmdline_p)
pr_info("User-defined physical RAM map:\n");
print_memory_map();
}
+#if defined(CONFIG_CPU_XLP) || defined(CONFIG_CPU_XLR)
+ plat_mem_fixup();
+#endif
bootmem_init();
#ifdef CONFIG_PROC_VMCORE
diff --git a/arch/mips/netlogic/common/Makefile b/arch/mips/netlogic/common/Makefile
index 362739d..44b0e7e 100644
--- a/arch/mips/netlogic/common/Makefile
+++ b/arch/mips/netlogic/common/Makefile
@@ -1,5 +1,6 @@
obj-y += irq.o time.o
obj-y += nlm-dma.o
obj-y += reset.o
+obj-y += memory.o
obj-$(CONFIG_SMP) += smp.o smpboot.o
obj-$(CONFIG_EARLY_PRINTK) += earlycons.o
diff --git a/arch/mips/netlogic/common/memory.c b/arch/mips/netlogic/common/memory.c
new file mode 100644
index 00000000..980c102
--- /dev/null
+++ b/arch/mips/netlogic/common/memory.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2003-2014 Broadcom Corporation
+ * All Rights Reserved
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the Broadcom
+ * license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/bootinfo.h>
+#include <asm/types.h>
+
+static const int prefetch_backup = 512;
+
+void __init plat_mem_fixup(void)
+{
+ int i;
+
+ /* fixup entries for prefetch */
+ for (i = 0; i < boot_mem_map.nr_map; i++) {
+ if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+ continue;
+ boot_mem_map.map[i].size -= prefetch_backup;
+ }
+}
diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c
index f743fd9..adc6390 100644
--- a/arch/mips/netlogic/xlp/setup.c
+++ b/arch/mips/netlogic/xlp/setup.c
@@ -64,18 +64,6 @@ static void nlm_linux_exit(void)
cpu_wait();
}
-static void nlm_fixup_mem(void)
-{
- const int pref_backup = 512;
- int i;
-
- for (i = 0; i < boot_mem_map.nr_map; i++) {
- if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
- continue;
- boot_mem_map.map[i].size -= pref_backup;
- }
-}
-
static void __init xlp_init_mem_from_bars(void)
{
uint64_t map[16];
@@ -114,8 +102,6 @@ void __init plat_mem_setup(void)
pr_info("Using DRAM BARs for memory map.\n");
xlp_init_mem_from_bars();
}
- /* Calculate and setup wired entries for mapped kernel */
- nlm_fixup_mem();
}
const char *get_system_type(void)
diff --git a/arch/mips/netlogic/xlr/setup.c b/arch/mips/netlogic/xlr/setup.c
index d118b9a..714f6a3 100644
--- a/arch/mips/netlogic/xlr/setup.c
+++ b/arch/mips/netlogic/xlr/setup.c
@@ -144,7 +144,6 @@ static void prom_add_memory(void)
{
struct nlm_boot_mem_map *bootm;
u64 start, size;
- u64 pref_backup = 512; /* avoid pref walking beyond end */
int i;
bootm = (void *)(long)nlm_prom_info.psb_mem_map;
@@ -158,7 +157,7 @@ static void prom_add_memory(void)
if (i == 0 && start == 0 && size == 0x0c000000)
size = 0x0ff00000;
- add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
+ add_memory_region(start, size, BOOT_MEM_RAM);
}
}
--
1.9.1
