diff options
| -rw-r--r-- | target/linux/generic/patches-2.6.36/992-mips_of_2.6.37_bp.patch | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.36/992-mips_of_2.6.37_bp.patch b/target/linux/generic/patches-2.6.36/992-mips_of_2.6.37_bp.patch new file mode 100644 index 000000000..9c16769c7 --- /dev/null +++ b/target/linux/generic/patches-2.6.36/992-mips_of_2.6.37_bp.patch @@ -0,0 +1,233 @@ +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(); + } |