From a95d0e1602f9f3ab54c7dbc9727bf22095705d1e Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 27 Mar 2009 14:25:29 +0100 Subject: microblaze_v8: memory inicialization, MMU, TLB Reviewed-by: Ingo Molnar Acked-by: John Linn Acked-by: Stephen Neuendorffer Acked-by: John Williams Signed-off-by: Michal Simek --- arch/microblaze/mm/init.c | 201 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 arch/microblaze/mm/init.c (limited to 'arch/microblaze/mm') diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c new file mode 100644 index 000000000000..b0c8213cd6cf --- /dev/null +++ b/arch/microblaze/mm/init.c @@ -0,0 +1,201 @@ +/* + * Copyright (C) 2007-2008 Michal Simek + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include /* mem_init */ +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +unsigned int __page_offset; +/* EXPORT_SYMBOL(__page_offset); */ + +char *klimit = _end; + +/* + * Initialize the bootmem system and give it all the memory we + * have available. + */ +unsigned int memory_start; +unsigned int memory_end; /* due to mm/nommu.c */ +unsigned int memory_size; + +/* + * paging_init() sets up the page tables - in fact we've already done this. + */ +static void __init paging_init(void) +{ + int i; + unsigned long zones_size[MAX_NR_ZONES]; + + /* + * old: we can DMA to/from any address.put all page into ZONE_DMA + * We use only ZONE_NORMAL + */ + zones_size[ZONE_NORMAL] = max_mapnr; + + /* every other zones are empty */ + for (i = 1; i < MAX_NR_ZONES; i++) + zones_size[i] = 0; + + free_area_init(zones_size); +} + +void __init setup_memory(void) +{ + int i; + unsigned long map_size; + u32 kernel_align_start, kernel_align_size; + + /* Find main memory where is the kernel */ + for (i = 0; i < lmb.memory.cnt; i++) { + memory_start = (u32) lmb.memory.region[i].base; + memory_end = (u32) lmb.memory.region[i].base + + (u32) lmb.memory.region[i].size; + if ((memory_start <= (u32)_text) && + ((u32)_text <= memory_end)) { + memory_size = memory_end - memory_start; + PAGE_OFFSET = memory_start; + printk(KERN_INFO "%s: Main mem: 0x%x-0x%x, " + "size 0x%08x\n", __func__, memory_start, + memory_end, memory_size); + break; + } + } + + if (!memory_start || !memory_end) { + panic("%s: Missing memory setting 0x%08x-0x%08x\n", + __func__, memory_start, memory_end); + } + + /* reservation of region where is the kernel */ + kernel_align_start = PAGE_DOWN((u32)_text); + /* ALIGN can be remove because _end in vmlinux.lds.S is align */ + kernel_align_size = PAGE_UP((u32)klimit) - kernel_align_start; + lmb_reserve(kernel_align_start, kernel_align_size); + printk(KERN_INFO "%s: kernel addr=0x%08x-0x%08x size=0x%08x\n", + __func__, kernel_align_start, kernel_align_start + + kernel_align_size, kernel_align_size); + + /* + * Kernel: + * start: base phys address of kernel - page align + * end: base phys address of kernel - page align + * + * min_low_pfn - the first page (mm/bootmem.c - node_boot_start) + * max_low_pfn + * max_mapnr - the first unused page (mm/bootmem.c - node_low_pfn) + * num_physpages - number of all pages + */ + + /* memory start is from the kernel end (aligned) to higher addr */ + min_low_pfn = memory_start >> PAGE_SHIFT; /* minimum for allocation */ + /* RAM is assumed contiguous */ + num_physpages = max_mapnr = memory_size >> PAGE_SHIFT; + max_pfn = max_low_pfn = memory_end >> PAGE_SHIFT; + + printk(KERN_INFO "%s: max_mapnr: %#lx\n", __func__, max_mapnr); + printk(KERN_INFO "%s: min_low_pfn: %#lx\n", __func__, min_low_pfn); + printk(KERN_INFO "%s: max_low_pfn: %#lx\n", __func__, max_low_pfn); + + /* + * Find an area to use for the bootmem bitmap. + * We look for the first area which is at least + * 128kB in length (128kB is enough for a bitmap + * for 4GB of memory, using 4kB pages), plus 1 page + * (in case the address isn't page-aligned). + */ + map_size = init_bootmem_node(NODE_DATA(0), PFN_UP(TOPHYS((u32)_end)), + min_low_pfn, max_low_pfn); + + lmb_reserve(PFN_UP(TOPHYS((u32)_end)) << PAGE_SHIFT, map_size); + + /* free bootmem is whole main memory */ + free_bootmem(memory_start, memory_size); + + /* reserve allocate blocks */ + for (i = 0; i < lmb.reserved.cnt; i++) { + pr_debug("reserved %d - 0x%08x-0x%08x\n", i, + (u32) lmb.reserved.region[i].base, + (u32) lmb_size_bytes(&lmb.reserved, i)); + reserve_bootmem(lmb.reserved.region[i].base, + lmb_size_bytes(&lmb.reserved, i) - 1, BOOTMEM_DEFAULT); + } + paging_init(); +} + +void free_init_pages(char *what, unsigned long begin, unsigned long end) +{ + unsigned long addr; + + for (addr = begin; addr < end; addr += PAGE_SIZE) { + ClearPageReserved(virt_to_page(addr)); + init_page_count(virt_to_page(addr)); + memset((void *)addr, 0xcc, PAGE_SIZE); + free_page(addr); + totalram_pages++; + } + printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ + int pages = 0; + for (; start < end; start += PAGE_SIZE) { + ClearPageReserved(virt_to_page(start)); + init_page_count(virt_to_page(start)); + free_page(start); + totalram_pages++; + pages++; + } + printk(KERN_NOTICE "Freeing initrd memory: %dk freed\n", pages); +} +#endif + +void free_initmem(void) +{ + free_init_pages("unused kernel memory", + (unsigned long)(&__init_begin), + (unsigned long)(&__init_end)); +} + +/* FIXME from arch/powerpc/mm/mem.c*/ +void show_mem(void) +{ + printk(KERN_NOTICE "%s\n", __func__); +} + +void __init mem_init(void) +{ + high_memory = (void *)__va(memory_end); + /* this will put all memory onto the freelists */ + totalram_pages += free_all_bootmem(); + + printk(KERN_INFO "Memory: %luk/%luk available\n", + (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), + num_physpages << (PAGE_SHIFT-10)); +} + +/* Check against bounds of physical memory */ +int ___range_ok(unsigned long addr, unsigned long size) +{ + return ((addr < memory_start) || + ((addr + size) > memory_end)); +} -- cgit v1.2.3 From 5f8ffb5f6649a261372547a5841285c23409ab68 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 27 Mar 2009 14:25:51 +0100 Subject: microblaze_v8: Makefiles for Microblaze cpu Reviewed-by: Ingo Molnar Acked-by: Randy Dunlap Acked-by: John Linn Acked-by: Stephen Neuendorffer Acked-by: John Williams Signed-off-by: Michal Simek --- arch/microblaze/Makefile | 69 +++++++++++++++++++++++++++++++ arch/microblaze/boot/Makefile | 17 ++++++++ arch/microblaze/kernel/Makefile | 19 +++++++++ arch/microblaze/kernel/cpu/Makefile | 8 ++++ arch/microblaze/lib/Makefile | 13 ++++++ arch/microblaze/mm/Makefile | 5 +++ arch/microblaze/platform/Makefile | 6 +++ arch/microblaze/platform/generic/Makefile | 3 ++ 8 files changed, 140 insertions(+) create mode 100644 arch/microblaze/Makefile create mode 100644 arch/microblaze/boot/Makefile create mode 100644 arch/microblaze/kernel/Makefile create mode 100644 arch/microblaze/kernel/cpu/Makefile create mode 100644 arch/microblaze/lib/Makefile create mode 100644 arch/microblaze/mm/Makefile create mode 100644 arch/microblaze/platform/Makefile create mode 100644 arch/microblaze/platform/generic/Makefile (limited to 'arch/microblaze/mm') diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile new file mode 100644 index 000000000000..0dcbb9832974 --- /dev/null +++ b/arch/microblaze/Makefile @@ -0,0 +1,69 @@ +UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\" + +# What CPU vesion are we building for, and crack it open +# as major.minor.rev +CPU_VER=$(subst ",,$(CONFIG_XILINX_MICROBLAZE0_HW_VER) ) +CPU_MAJOR=$(shell echo $(CPU_VER) | cut -d '.' -f 1) +CPU_MINOR=$(shell echo $(CPU_VER) | cut -d '.' -f 2) +CPU_REV=$(shell echo $(CPU_VER) | cut -d '.' -f 3) + +export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV + +# Use cpu-related CONFIG_ vars to set compile options. + +# Work out HW multipler support. This is icky. +# 1. Spartan2 has no HW multiplers. +# 2. MicroBlaze v3.x always uses them, except in Spartan 2 +# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings +ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY))) + ifeq ($(CPU_MAJOR),3) + CPUFLAGS-1 += -mno-xl-soft-mul + else + # USE_HW_MUL can be 0, 1, or 2, defining a heirarchy of HW Mul support. + CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high + CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul + endif +endif +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift +CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP) += -mxl-pattern-compare + +CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER)) + +# The various CONFIG_XILINX cpu features options are integers 0/1/2... +# rather than bools y/n +CFLAGS += $(CPUFLAGS-1) +CFLAGS += $(CPUFLAGS-2) + +# r31 holds current when in kernel mode +CFLAGS += -ffixed-r31 + +LDFLAGS_BLOB := --format binary --oformat elf32-microblaze + +LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) + +head-y := arch/microblaze/kernel/head.o +libs-y += arch/microblaze/lib/ $(LIBGCC) +core-y += arch/microblaze/kernel/ arch/microblaze/mm/ \ + arch/microblaze/platform/ + +boot := arch/$(ARCH)/boot + +# defines filename extension depending memory management type +ifeq ($(CONFIG_MMU),) +MMUEXT := -nommu +endif +export MMUEXT + +all: linux.bin + +archclean: + $(Q)$(MAKE) $(clean)=$(boot) + +linux.bin linux.bin.gz: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +define archhelp + echo '* linux.bin - Create raw binary' + echo ' linux.bin.gz - Create compressed raw binary' +endef diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile new file mode 100644 index 000000000000..844edf406d34 --- /dev/null +++ b/arch/microblaze/boot/Makefile @@ -0,0 +1,17 @@ +# +# arch/microblaze/boot/Makefile +# + +targets := linux.bin linux.bin.gz + +OBJCOPYFLAGS_linux.bin := -O binary + +$(obj)/linux.bin: vmlinux FORCE + $(call if_changed,objcopy) + @echo 'Kernel: $@ is ready' ' (#'`cat .version`')' + +$(obj)/linux.bin.gz: $(obj)/linux.bin FORCE + $(call if_changed,gzip) + @echo 'Kernel: $@ is ready' ' (#'`cat .version`')' + +clean-kernel += linux.bin linux.bin.gz diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile new file mode 100644 index 000000000000..da94bec4ecba --- /dev/null +++ b/arch/microblaze/kernel/Makefile @@ -0,0 +1,19 @@ +# +# Makefile +# + +extra-y := head.o vmlinux.lds + +obj-y += exceptions.o \ + hw_exception_handler.o init_task.o intc.o irq.o of_device.o \ + of_platform.o process.o prom.o prom_parse.o ptrace.o \ + setup.o signal.o sys_microblaze.o timer.o traps.o + +obj-y += cpu/ + +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +obj-$(CONFIG_SELFMOD) += selfmod.o +obj-$(CONFIG_HEART_BEAT) += heartbeat.o +obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o + +obj-y += entry$(MMUEXT).o diff --git a/arch/microblaze/kernel/cpu/Makefile b/arch/microblaze/kernel/cpu/Makefile new file mode 100644 index 000000000000..20646e549271 --- /dev/null +++ b/arch/microblaze/kernel/cpu/Makefile @@ -0,0 +1,8 @@ +# +# Build the appropriate CPU version support +# + +EXTRA_CFLAGS += -DCPU_MAJOR=$(CPU_MAJOR) -DCPU_MINOR=$(CPU_MINOR) \ + -DCPU_REV=$(CPU_REV) + +obj-y += cache.o cpuinfo.o cpuinfo-pvr-full.o cpuinfo-static.o mb.o pvr.o diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile new file mode 100644 index 000000000000..d27126bf306a --- /dev/null +++ b/arch/microblaze/lib/Makefile @@ -0,0 +1,13 @@ +# +# Makefile +# + +lib-y := memset.o checksum.o + +ifeq ($(CONFIG_OPT_LIB_ASM),y) +lib-y += fastcopy.o +else +lib-y += memcpy.o memmove.o +endif + +lib-y += uaccess.o diff --git a/arch/microblaze/mm/Makefile b/arch/microblaze/mm/Makefile new file mode 100644 index 000000000000..bf9e4479a1fd --- /dev/null +++ b/arch/microblaze/mm/Makefile @@ -0,0 +1,5 @@ +# +# Makefile +# + +obj-y := init.o diff --git a/arch/microblaze/platform/Makefile b/arch/microblaze/platform/Makefile new file mode 100644 index 000000000000..ea1b75cc5775 --- /dev/null +++ b/arch/microblaze/platform/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for arch/microblaze/platform directory +# +#obj-$(CONFIG_PLATFORM_GENERIC) += generic/ + +obj-y += platform.o diff --git a/arch/microblaze/platform/generic/Makefile b/arch/microblaze/platform/generic/Makefile new file mode 100644 index 000000000000..9a8b1bd3fa6d --- /dev/null +++ b/arch/microblaze/platform/generic/Makefile @@ -0,0 +1,3 @@ +# +# Empty Makefile to keep make clean happy +# -- cgit v1.2.3