diff options
Diffstat (limited to 'arch/sh/kernel')
| -rw-r--r-- | arch/sh/kernel/machine_kexec.c | 59 | ||||
| -rw-r--r-- | arch/sh/kernel/machvec.c | 1 | ||||
| -rw-r--r-- | arch/sh/kernel/setup.c | 228 |
3 files changed, 85 insertions, 203 deletions
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 0e90c7f9564..5a559e666eb 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -8,7 +8,6 @@ * This source code is licensed under the GNU General Public License, * Version 2. See the file COPYING for more details. */ - #include <linux/mm.h> #include <linux/kexec.h> #include <linux/delay.h> @@ -16,6 +15,7 @@ #include <linux/numa.h> #include <linux/ftrace.h> #include <linux/suspend.h> +#include <linux/lmb.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/mmu_context.h> @@ -151,3 +151,60 @@ void arch_crash_save_vmcoreinfo(void) VMCOREINFO_CONFIG(X2TLB); #endif } + +void __init reserve_crashkernel(void) +{ + unsigned long long crash_size, crash_base; + int ret; + + /* this is necessary because of lmb_phys_mem_size() */ + lmb_analyze(); + + ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(), + &crash_size, &crash_base); + if (ret == 0 && crash_size > 0) { + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + } + + if (crashk_res.end == crashk_res.start) + goto disable; + + crash_size = PAGE_ALIGN(crashk_res.end - crashk_res.start + 1); + if (!crashk_res.start) { + unsigned long max = lmb_end_of_DRAM() - memory_limit; + crashk_res.start = __lmb_alloc_base(crash_size, PAGE_SIZE, max); + if (!crashk_res.start) { + pr_err("crashkernel allocation failed\n"); + goto disable; + } + } else { + ret = lmb_reserve(crashk_res.start, crash_size); + if (unlikely(ret < 0)) { + pr_err("crashkernel reservation failed - " + "memory is in use\n"); + goto disable; + } + } + + crashk_res.end = crashk_res.start + crash_size - 1; + + /* + * Crash kernel trumps memory limit + */ + if ((lmb_end_of_DRAM() - memory_limit) <= crashk_res.end) { + memory_limit = 0; + pr_info("Disabled memory limit for crashkernel\n"); + } + + pr_info("Reserving %ldMB of memory at 0x%08lx " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crashk_res.start), + (unsigned long)(lmb_phys_mem_size() >> 20)); + + return; + +disable: + crashk_res.start = crashk_res.end = 0; +} diff --git a/arch/sh/kernel/machvec.c b/arch/sh/kernel/machvec.c index 1652340ba3f..85cfaf916fd 100644 --- a/arch/sh/kernel/machvec.c +++ b/arch/sh/kernel/machvec.c @@ -131,6 +131,7 @@ void __init sh_mv_setup(void) mv_set(ioport_unmap); mv_set(irq_demux); mv_set(mode_pins); + mv_set(mem_init); if (!sh_mv.mv_nr_irqs) sh_mv.mv_nr_irqs = NR_IRQS; diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 4f1585f41f2..272734681d2 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -4,7 +4,7 @@ * This file handles the architecture-dependent parts of initialization * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2002 - 2007 Paul Mundt + * Copyright (C) 2002 - 2010 Paul Mundt */ #include <linux/screen_info.h> #include <linux/ioport.h> @@ -41,6 +41,7 @@ #include <asm/clock.h> #include <asm/smp.h> #include <asm/mmu_context.h> +#include <asm/mmzone.h> /* * Initialize loops_per_jiffy as 10000000 (1000MIPS). @@ -94,6 +95,7 @@ unsigned long memory_start; EXPORT_SYMBOL(memory_start); unsigned long memory_end = 0; EXPORT_SYMBOL(memory_end); +unsigned long memory_limit = 0; static struct resource mem_resources[MAX_NUMNODES]; @@ -101,94 +103,18 @@ int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; static int __init early_parse_mem(char *p) { - unsigned long size; + if (!p) + return 1; - memory_start = (unsigned long)__va(__MEMORY_START); - size = memparse(p, &p); + memory_limit = PAGE_ALIGN(memparse(p, &p)); - if (size > __MEMORY_SIZE) { - printk(KERN_ERR - "Using mem= to increase the size of kernel memory " - "is not allowed.\n" - " Recompile the kernel with the correct value for " - "CONFIG_MEMORY_SIZE.\n"); - return 0; - } - - memory_end = memory_start + size; + pr_notice("Memory limited to %ldMB\n", memory_limit >> 20); return 0; } early_param("mem", early_parse_mem); -/* - * Register fully available low RAM pages with the bootmem allocator. - */ -static void __init register_bootmem_low_pages(void) -{ - unsigned long curr_pfn, last_pfn, pages; - - /* - * We are rounding up the start address of usable memory: - */ - curr_pfn = PFN_UP(__MEMORY_START); - - /* - * ... and at the end of the usable range downwards: - */ - last_pfn = PFN_DOWN(__pa(memory_end)); - - if (last_pfn > max_low_pfn) - last_pfn = max_low_pfn; - - pages = last_pfn - curr_pfn; - free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); -} - -#ifdef CONFIG_KEXEC -static void __init reserve_crashkernel(void) -{ - unsigned long long free_mem; - unsigned long long crash_size, crash_base; - void *vp; - int ret; - - free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; - - ret = parse_crashkernel(boot_command_line, free_mem, - &crash_size, &crash_base); - if (ret == 0 && crash_size) { - if (crash_base <= 0) { - vp = alloc_bootmem_nopanic(crash_size); - if (!vp) { - printk(KERN_INFO "crashkernel allocation " - "failed\n"); - return; - } - crash_base = __pa(vp); - } else if (reserve_bootmem(crash_base, crash_size, - BOOTMEM_EXCLUSIVE) < 0) { - printk(KERN_INFO "crashkernel reservation failed - " - "memory is in use\n"); - return; - } - - printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " - "for crashkernel (System RAM: %ldMB)\n", - (unsigned long)(crash_size >> 20), - (unsigned long)(crash_base >> 20), - (unsigned long)(free_mem >> 20)); - crashk_res.start = crash_base; - crashk_res.end = crash_base + crash_size - 1; - insert_resource(&iomem_resource, &crashk_res); - } -} -#else -static inline void __init reserve_crashkernel(void) -{} -#endif - -static void __init check_for_initrd(void) +void __init check_for_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD unsigned long start, end; @@ -235,7 +161,7 @@ static void __init check_for_initrd(void) initrd_start = (unsigned long)__va(__pa(start)); initrd_end = initrd_start + INITRD_SIZE; - reserve_bootmem(__pa(initrd_start), INITRD_SIZE, BOOTMEM_DEFAULT); + lmb_reserve(__pa(initrd_start), INITRD_SIZE); return; @@ -265,13 +191,18 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn, unsigned long end_pfn) { struct resource *res = &mem_resources[nid]; + unsigned long start, end; WARN_ON(res->name); /* max one active range per node for now */ + start = start_pfn << PAGE_SHIFT; + end = end_pfn << PAGE_SHIFT; + res->name = "System RAM"; - res->start = start_pfn << PAGE_SHIFT; - res->end = (end_pfn << PAGE_SHIFT) - 1; + res->start = start; + res->end = end - 1; res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; + if (request_resource(&iomem_resource, res)) { pr_err("unable to request memory_resource 0x%lx 0x%lx\n", start_pfn, end_pfn); @@ -287,100 +218,18 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn, request_resource(res, &data_resource); request_resource(res, &bss_resource); - add_active_range(nid, start_pfn, end_pfn); -} - -void __init setup_bootmem_allocator(unsigned long free_pfn) -{ - unsigned long bootmap_size; - unsigned long bootmap_pages, bootmem_paddr; - u64 total_pages = (lmb_end_of_DRAM() - __MEMORY_START) >> PAGE_SHIFT; - int i; - - bootmap_pages = bootmem_bootmap_pages(total_pages); - - bootmem_paddr = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE); - - /* - * Find a proper area for the bootmem bitmap. After this - * bootstrap step all allocations (until the page allocator - * is intact) must be done via bootmem_alloc(). - */ - bootmap_size = init_bootmem_node(NODE_DATA(0), - bootmem_paddr >> PAGE_SHIFT, - min_low_pfn, max_low_pfn); - - /* Add active regions with valid PFNs. */ - for (i = 0; i < lmb.memory.cnt; i++) { - unsigned long start_pfn, end_pfn; - start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT; - end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i); - __add_active_range(0, start_pfn, end_pfn); - } - - /* - * Add all physical memory to the bootmem map and mark each - * area as present. - */ - register_bootmem_low_pages(); - - /* Reserve the sections we're already using. */ - for (i = 0; i < lmb.reserved.cnt; i++) - reserve_bootmem(lmb.reserved.region[i].base, - lmb_size_bytes(&lmb.reserved, i), - BOOTMEM_DEFAULT); - - node_set_online(0); - - sparse_memory_present_with_active_regions(0); - - check_for_initrd(); - - reserve_crashkernel(); -} - -#ifndef CONFIG_NEED_MULTIPLE_NODES -static void __init setup_memory(void) -{ - unsigned long start_pfn; - u64 base = min_low_pfn << PAGE_SHIFT; - u64 size = (max_low_pfn << PAGE_SHIFT) - base; - /* - * Partially used pages are not usable - thus - * we are rounding upwards: + * Also make sure that there is a PMB mapping that covers this + * range before we attempt to activate it, to avoid reset by MMU. + * We can hit this path with NUMA or memory hot-add. */ - start_pfn = PFN_UP(__pa(_end)); + pmb_bolt_mapping((unsigned long)__va(start), start, end - start, + PAGE_KERNEL); - lmb_add(base, size); - - /* - * Reserve the kernel text and - * Reserve the bootmem bitmap. We do this in two steps (first step - * was init_bootmem()), because this catches the (definitely buggy) - * case of us accidentally initializing the bootmem allocator with - * an invalid RAM area. - */ - lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET, - (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) - - (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET)); - - /* - * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET. - */ - if (CONFIG_ZERO_PAGE_OFFSET != 0) - lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET); - - lmb_analyze(); - lmb_dump_all(); - - setup_bootmem_allocator(start_pfn); + add_active_range(nid, start_pfn, end_pfn); } -#else -extern void __init setup_memory(void); -#endif -void __init __attribute__ ((weak)) plat_early_device_setup(void) +void __init __weak plat_early_device_setup(void) { } @@ -421,10 +270,6 @@ void __init setup_arch(char **cmdline_p) bss_resource.start = virt_to_phys(__bss_start); bss_resource.end = virt_to_phys(_ebss)-1; - memory_start = (unsigned long)__va(__MEMORY_START); - if (!memory_end) - memory_end = memory_start + __MEMORY_SIZE; - #ifdef CONFIG_CMDLINE_OVERWRITE strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); #else @@ -441,39 +286,18 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); - uncached_init(); - plat_early_device_setup(); - /* Let earlyprintk output early console messages */ - early_platform_driver_probe("earlyprintk", 1, 1); - sh_mv_setup(); - /* - * Find the highest page frame number we have available - */ - max_pfn = PFN_DOWN(__pa(memory_end)); - - /* - * Determine low and high memory ranges: - */ - max_low_pfn = max_pfn; - min_low_pfn = __MEMORY_START >> PAGE_SHIFT; - - nodes_clear(node_online_map); + /* Let earlyprintk output early console messages */ + early_platform_driver_probe("earlyprintk", 1, 1); - pmb_init(); - lmb_init(); - setup_memory(); - sparse_init(); + paging_init(); #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; #endif - paging_init(); - - ioremap_fixed_init(); /* Perform the machine specific initialisation */ if (likely(sh_mv.mv_setup)) |