1 files changed, 70 insertions, 228 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 8870d6ba64b..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>
@@ -39,7 +39,9 @@
 #include <asm/irq.h>
 #include <asm/setup.h>
 #include <asm/clock.h>
+#include <asm/smp.h>
 #include <asm/mmu_context.h>
+#include <asm/mmzone.h>
 
 /*
  * Initialize loops_per_jiffy as 10000000 (1000MIPS).
@@ -93,6 +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];
 
@@ -100,92 +103,73 @@ 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)
+void __init check_for_initrd(void)
 {
-        unsigned long curr_pfn, last_pfn, pages;
+#ifdef CONFIG_BLK_DEV_INITRD
+        unsigned long start, end;
+
+        /*
+         * Check for the rare cases where boot loaders adhere to the boot
+         * ABI.
+         */
+        if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
+                goto disable;
+
+        start = INITRD_START + __MEMORY_START;
+        end = start + INITRD_SIZE;
+
+        if (unlikely(end <= start))
+                goto disable;
+        if (unlikely(start & ~PAGE_MASK)) {
+                pr_err("initrd must be page aligned\n");
+                goto disable;
+        }
+
+        if (unlikely(start < PAGE_OFFSET)) {
+                pr_err("initrd start < PAGE_OFFSET\n");
+                goto disable;
+        }
+
+        if (unlikely(end > lmb_end_of_DRAM())) {
+                pr_err("initrd extends beyond end of memory "
+                       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+                       end, (unsigned long)lmb_end_of_DRAM());
+                goto disable;
+        }
 
         /*
-         * We are rounding up the start address of usable memory:
+         * If we got this far inspite of the boot loader's best efforts
+         * to the contrary, assume we actually have a valid initrd and
+         * fix up the root dev.
          */
-        curr_pfn = PFN_UP(__MEMORY_START);
+        ROOT_DEV = Root_RAM0;
 
         /*
-         * ... and at the end of the usable range downwards:
+         * Address sanitization
          */
-        last_pfn = PFN_DOWN(__pa(memory_end));
+        initrd_start = (unsigned long)__va(__pa(start));
+        initrd_end = initrd_start + INITRD_SIZE;
 
-        if (last_pfn > max_low_pfn)
-                last_pfn = max_low_pfn;
+        lmb_reserve(__pa(initrd_start), INITRD_SIZE);
 
-        pages = last_pfn - curr_pfn;
-        free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
-}
+        return;
 
-#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)
-{}
+disable:
+        pr_info("initrd disabled\n");
+        initrd_start = initrd_end = 0;
 #endif
+}
 
 void __cpuinit calibrate_delay(void)
 {
@@ -207,13 +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);
@@ -229,138 +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);
-
-#ifdef CONFIG_BLK_DEV_INITRD
-        ROOT_DEV = Root_RAM0;
-
-        if (LOADER_TYPE && INITRD_START) {
-                unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
-
-                if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
-                        reserve_bootmem(initrd_start_phys, INITRD_SIZE,
-                                        BOOTMEM_DEFAULT);
-                        initrd_start = (unsigned long)__va(initrd_start_phys);
-                        initrd_end = initrd_start + INITRD_SIZE;
-                } else {
-                        printk("initrd extends beyond end of memory "
-                               "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
-                               initrd_start_phys + INITRD_SIZE,
-                               (unsigned long)PFN_PHYS(max_low_pfn));
-                        initrd_start = 0;
-                }
-        }
-#endif
-
-        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:
-         */
-        start_pfn = PFN_UP(__pa(_end));
-
-        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.
+         * 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.
          */
-        if (CONFIG_ZERO_PAGE_OFFSET != 0)
-                lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
-
-        lmb_analyze();
-        lmb_dump_all();
+        pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+                         PAGE_KERNEL);
 
-        setup_bootmem_allocator(start_pfn);
-}
-#else
-extern void __init setup_memory(void);
-#endif
-
-/*
- * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
- * is_kdump_kernel() to determine if we are booting after a panic. Hence
- * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
- */
-#ifdef CONFIG_CRASH_DUMP
-/* elfcorehdr= specifies the location of elf core header
- * stored by the crashed kernel.
- */
-static int __init parse_elfcorehdr(char *arg)
-{
-        if (!arg)
-                return -EINVAL;
-        elfcorehdr_addr = memparse(arg, &arg);
-        return 0;
+        add_active_range(nid, start_pfn, end_pfn);
 }
-early_param("elfcorehdr", parse_elfcorehdr);
-#endif
 
-void __init __attribute__ ((weak)) plat_early_device_setup(void)
+void __init __weak plat_early_device_setup(void)
 {
 }
 
@@ -401,10 +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
@@ -421,47 +286,24 @@ 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))
                 sh_mv.mv_setup(cmdline_p);
 
-#ifdef CONFIG_SMP
         plat_smp_setup();
-#endif
 }
 
 /* processor boot mode configuration */