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authorJayachandran C <jayachandranc@netlogicmicro.com>2012-07-13 21:53:22 +0530
committerJohn Crispin <blogic@openwrt.org>2012-08-22 23:46:37 +0200
commit2f6528e15a4592c762a690c1320518368593ae75 (patch)
tree6fd1aafd2586875f2905398a1e0ab8f5c571142a
parenta9f16821205d7561bf9d622855e1aa95e5c77f0c (diff)
downloadop-kernel-dev-2f6528e15a4592c762a690c1320518368593ae75.zip
op-kernel-dev-2f6528e15a4592c762a690c1320518368593ae75.tar.gz
MIPS: Netlogic: Add support for built in DTB
Provide a config option to embed a device tree for XLP evaluation boards. This DTB will be used if the firmware does not pass in a device tree pointer. Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com> Patchwork: http://patchwork.linux-mips.org/patch/4103/ Signed-off-by: John Crispin <blogic@openwrt.org>
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/netlogic/Kconfig15
-rw-r--r--arch/mips/netlogic/Makefile1
-rw-r--r--arch/mips/netlogic/dts/Makefile4
-rw-r--r--arch/mips/netlogic/xlp/setup.c12
5 files changed, 32 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 331d574..8190bdc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -830,6 +830,7 @@ config NLM_XLP_BOARD
select ZONE_DMA if 64BIT
select SYNC_R4K
select SYS_HAS_EARLY_PRINTK
+ select USE_OF
help
This board is based on Netlogic XLP Processor.
Say Y here if you have a XLP based board.
diff --git a/arch/mips/netlogic/Kconfig b/arch/mips/netlogic/Kconfig
index 75bec44..8059eb7 100644
--- a/arch/mips/netlogic/Kconfig
+++ b/arch/mips/netlogic/Kconfig
@@ -1,2 +1,17 @@
+if NLM_XLP_BOARD || NLM_XLR_BOARD
+
+if NLM_XLP_BOARD
+config DT_XLP_EVP
+ bool "Built-in device tree for XLP EVP/SVP boards"
+ default y
+ help
+ Add an FDT blob for XLP EVP and SVP boards into the kernel.
+ This DTB will be used if the firmware does not pass in a DTB
+ pointer to the kernel. The corresponding DTS file is at
+ arch/mips/netlogic/dts/xlp_evp.dts
+endif
+
config NLM_COMMON
bool
+
+endif
diff --git a/arch/mips/netlogic/Makefile b/arch/mips/netlogic/Makefile
index 36d169b..7602d13 100644
--- a/arch/mips/netlogic/Makefile
+++ b/arch/mips/netlogic/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_NLM_COMMON) += common/
obj-$(CONFIG_CPU_XLR) += xlr/
obj-$(CONFIG_CPU_XLP) += xlp/
+obj-$(CONFIG_CPU_XLP) += dts/
diff --git a/arch/mips/netlogic/dts/Makefile b/arch/mips/netlogic/dts/Makefile
new file mode 100644
index 0000000..67ae3fe2
--- /dev/null
+++ b/arch/mips/netlogic/dts/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_DT_XLP_EVP) := xlp_evp.dtb.o
+
+$(obj)/%.dtb: $(obj)/%.dts
+ $(call if_changed,dtc)
diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c
index 0d2d679..d899709 100644
--- a/arch/mips/netlogic/xlp/setup.c
+++ b/arch/mips/netlogic/xlp/setup.c
@@ -57,6 +57,7 @@ unsigned long nlm_common_ebase = 0x0;
/* default to uniprocessor */
uint32_t nlm_coremask = 1, nlm_cpumask = 1;
int nlm_threads_per_core = 1;
+extern u32 __dtb_start[];
static void nlm_linux_exit(void)
{
@@ -97,9 +98,18 @@ void __init prom_init(void)
{
void *fdtp;
- fdtp = (void *)(long)fw_arg0;
xlp_mmu_init();
nlm_hal_init();
+
+ /*
+ * If no FDT pointer is passed in, use the built-in FDT.
+ * device_tree_init() does not handle CKSEG0 pointers in
+ * 64-bit, so convert pointer.
+ */
+ fdtp = (void *)(long)fw_arg0;
+ if (!fdtp)
+ fdtp = __dtb_start;
+ fdtp = phys_to_virt(__pa(fdtp));
early_init_devtree(fdtp);
nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
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