mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-14 12:23:08 +02:00
7f98aaaa7a
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23991 3c298f89-4303-0410-b956-a3cf2f4a3e73
234 lines
6.2 KiB
Diff
234 lines
6.2 KiB
Diff
From: Dezhong Diao <dediao@cisco.com>
|
|
Date: Wed, 13 Oct 2010 06:52:46 +0000 (-0600)
|
|
Subject: of/mips: Add device tree support to MIPS
|
|
X-Git-Tag: v2.6.37-rc1~129^2~3
|
|
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=f2ffa5ab74f4dfd598860f96ca37a71c4d0a28a8
|
|
|
|
of/mips: Add device tree support to MIPS
|
|
|
|
Add the ability to enable CONFIG_OF on the MIPS architecture.
|
|
|
|
Signed-off-by: Dezhong Diao <dediao@cisco.com>
|
|
[grant.likely@secretlab.ca: cleared out obsolete hooks,
|
|
removed ARCH_HAS_DEVTREE_MEM,
|
|
remove __init tags from header file,
|
|
removed debugfs support hunk]
|
|
[ddaney@linux-mips.org: backed out over aggressive trimming of hooks]
|
|
Acked-by: Ralf Baechle <ralf@linux-mips.org>
|
|
Tested-by: David Daney <ddaney@caviumnetworks.com>
|
|
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
|
|
---
|
|
|
|
--- a/arch/mips/Kconfig
|
|
+++ b/arch/mips/Kconfig
|
|
@@ -2146,6 +2146,13 @@ config SECCOMP
|
|
|
|
If unsure, say Y. Only embedded should say N here.
|
|
|
|
+config USE_OF
|
|
+ bool "Flattened Device Tree support"
|
|
+ select OF
|
|
+ select OF_FLATTREE
|
|
+ help
|
|
+ Include support for flattened device tree machine descriptions.
|
|
+
|
|
endmenu
|
|
|
|
config LOCKDEP_SUPPORT
|
|
--- a/arch/mips/include/asm/irq.h
|
|
+++ b/arch/mips/include/asm/irq.h
|
|
@@ -16,6 +16,11 @@
|
|
|
|
#include <irq.h>
|
|
|
|
+static inline void irq_dispose_mapping(unsigned int virq)
|
|
+{
|
|
+ return;
|
|
+}
|
|
+
|
|
#ifdef CONFIG_I8259
|
|
static inline int irq_canonicalize(int irq)
|
|
{
|
|
--- /dev/null
|
|
+++ b/arch/mips/include/asm/prom.h
|
|
@@ -0,0 +1,35 @@
|
|
+/*
|
|
+ * arch/mips/include/asm/prom.h
|
|
+ *
|
|
+ * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ *
|
|
+ */
|
|
+#ifndef __ASM_MIPS_PROM_H
|
|
+#define __ASM_MIPS_PROM_H
|
|
+
|
|
+#ifdef CONFIG_OF
|
|
+#include <linux/init.h>
|
|
+
|
|
+#include <asm/setup.h>
|
|
+#include <asm/irq.h>
|
|
+#include <asm/bootinfo.h>
|
|
+
|
|
+/* which is compatible with the flattened device tree (FDT) */
|
|
+#define cmd_line arcs_cmdline
|
|
+
|
|
+extern int early_init_dt_scan_memory_arch(unsigned long node,
|
|
+ const char *uname, int depth, void *data);
|
|
+
|
|
+extern int reserve_mem_mach(unsigned long addr, unsigned long size);
|
|
+extern void free_mem_mach(unsigned long addr, unsigned long size);
|
|
+
|
|
+extern void __init device_tree_init(void);
|
|
+#else /* CONFIG_OF */
|
|
+static inline void __init device_tree_init(void) { }
|
|
+#endif /* CONFIG_OF */
|
|
+
|
|
+#endif /* _ASM_MIPS_PROM_H */
|
|
--- a/arch/mips/kernel/Makefile
|
|
+++ b/arch/mips/kernel/Makefile
|
|
@@ -97,6 +97,8 @@ obj-$(CONFIG_EARLY_PRINTK) += early_prin
|
|
obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o
|
|
obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o
|
|
|
|
+obj-$(CONFIG_OF) += prom.o
|
|
+
|
|
CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
|
|
|
|
obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o
|
|
--- /dev/null
|
|
+++ b/arch/mips/kernel/prom.c
|
|
@@ -0,0 +1,112 @@
|
|
+/*
|
|
+ * MIPS support for CONFIG_OF device tree support
|
|
+ *
|
|
+ * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include <linux/init.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/errno.h>
|
|
+#include <linux/types.h>
|
|
+#include <linux/bootmem.h>
|
|
+#include <linux/initrd.h>
|
|
+#include <linux/debugfs.h>
|
|
+#include <linux/of.h>
|
|
+#include <linux/of_fdt.h>
|
|
+#include <linux/of_irq.h>
|
|
+#include <linux/of_platform.h>
|
|
+
|
|
+#include <asm/page.h>
|
|
+#include <asm/prom.h>
|
|
+
|
|
+int __init early_init_dt_scan_memory_arch(unsigned long node,
|
|
+ const char *uname, int depth,
|
|
+ void *data)
|
|
+{
|
|
+ return early_init_dt_scan_memory(node, uname, depth, data);
|
|
+}
|
|
+
|
|
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
|
|
+{
|
|
+ return add_memory_region(base, size, BOOT_MEM_RAM);
|
|
+}
|
|
+
|
|
+int __init reserve_mem_mach(unsigned long addr, unsigned long size)
|
|
+{
|
|
+ return reserve_bootmem(addr, size, BOOTMEM_DEFAULT);
|
|
+}
|
|
+
|
|
+void __init free_mem_mach(unsigned long addr, unsigned long size)
|
|
+{
|
|
+ return free_bootmem(addr, size);
|
|
+}
|
|
+
|
|
+u64 __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
|
|
+{
|
|
+ return virt_to_phys(
|
|
+ __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS))
|
|
+ );
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_BLK_DEV_INITRD
|
|
+void __init early_init_dt_setup_initrd_arch(unsigned long start,
|
|
+ unsigned long end)
|
|
+{
|
|
+ initrd_start = (unsigned long)__va(start);
|
|
+ initrd_end = (unsigned long)__va(end);
|
|
+ initrd_below_start_ok = 1;
|
|
+}
|
|
+#endif
|
|
+
|
|
+/*
|
|
+ * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq#
|
|
+ *
|
|
+ * Currently the mapping mechanism is trivial; simple flat hwirq numbers are
|
|
+ * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not
|
|
+ * supported.
|
|
+ */
|
|
+unsigned int irq_create_of_mapping(struct device_node *controller,
|
|
+ const u32 *intspec, unsigned int intsize)
|
|
+{
|
|
+ return intspec[0];
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(irq_create_of_mapping);
|
|
+
|
|
+void __init early_init_devtree(void *params)
|
|
+{
|
|
+ /* Setup flat device-tree pointer */
|
|
+ initial_boot_params = params;
|
|
+
|
|
+ /* Retrieve various informations from the /chosen node of the
|
|
+ * device-tree, including the platform type, initrd location and
|
|
+ * size, and more ...
|
|
+ */
|
|
+ of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
|
|
+
|
|
+ /* Scan memory nodes */
|
|
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
|
|
+ of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
|
|
+}
|
|
+
|
|
+void __init device_tree_init(void)
|
|
+{
|
|
+ unsigned long base, size;
|
|
+
|
|
+ if (!initial_boot_params)
|
|
+ return;
|
|
+
|
|
+ base = virt_to_phys((void *)initial_boot_params);
|
|
+ size = initial_boot_params->totalsize;
|
|
+
|
|
+ /* Before we do anything, lets reserve the dt blob */
|
|
+ reserve_mem_mach(base, size);
|
|
+
|
|
+ unflatten_device_tree();
|
|
+
|
|
+ /* free the space reserved for the dt blob */
|
|
+ free_mem_mach(base, size);
|
|
+}
|
|
--- a/arch/mips/kernel/setup.c
|
|
+++ b/arch/mips/kernel/setup.c
|
|
@@ -31,6 +31,7 @@
|
|
#include <asm/setup.h>
|
|
#include <asm/smp-ops.h>
|
|
#include <asm/system.h>
|
|
+#include <asm/prom.h>
|
|
|
|
struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
|
|
|
|
@@ -487,6 +488,7 @@ static void __init arch_mem_init(char **
|
|
}
|
|
|
|
bootmem_init();
|
|
+ device_tree_init();
|
|
sparse_init();
|
|
paging_init();
|
|
}
|