/*
- * File: arch/blackfin/mm/init.c
- * Based on:
- * Author:
+ * Copyright 2004-2009 Analog Devices Inc.
*
- * Created:
- * Description:
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under the GPL-2 or later.
*/
+#include <linux/gfp.h>
#include <linux/swap.h>
#include <linux/bootmem.h>
+#include <linux/uaccess.h>
#include <asm/bfin-global.h>
-#include <asm/uaccess.h>
-#include <asm/l1layout.h>
+#include <asm/pda.h>
+#include <asm/cplbinit.h>
+#include <asm/early_printk.h>
#include "blackfin_sram.h"
/*
static unsigned long empty_bad_page;
-unsigned long empty_zero_page;
+static unsigned long empty_zero_page;
-void show_mem(void)
-{
- unsigned long i;
- int free = 0, total = 0, reserved = 0, shared = 0;
-
- int cached = 0;
- printk(KERN_INFO "Mem-info:\n");
- show_free_areas();
- i = max_mapnr;
- while (i-- > 0) {
- total++;
- if (PageReserved(mem_map + i))
- reserved++;
- else if (PageSwapCache(mem_map + i))
- cached++;
- else if (!page_count(mem_map + i))
- free++;
- else
- shared += page_count(mem_map + i) - 1;
- }
- printk(KERN_INFO "%d pages of RAM\n", total);
- printk(KERN_INFO "%d free pages\n", free);
- printk(KERN_INFO "%d reserved pages\n", reserved);
- printk(KERN_INFO "%d pages shared\n", shared);
- printk(KERN_INFO "%d pages swap cached\n", cached);
-}
+#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#if defined CONFIG_SYSCALL_TAB_L1
+__attribute__((l1_data))
+#endif
+static unsigned long exception_stack[NR_CPUS][1024];
+#endif
+
+struct blackfin_pda cpu_pda[NR_CPUS];
+EXPORT_SYMBOL(cpu_pda);
/*
* paging_init() continues the virtual memory environment setup which
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
-void paging_init(void)
+void __init paging_init(void)
{
/*
* make sure start_mem is page aligned, otherwise bootmem and
{
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
- zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
+ zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
+ zones_size[ZONE_NORMAL] = 0;
#ifdef CONFIG_HIGHMEM
zones_size[ZONE_HIGHMEM] = 0;
#endif
}
}
-void mem_init(void)
+asmlinkage void __init init_pda(void)
+{
+ unsigned int cpu = raw_smp_processor_id();
+
+ early_shadow_stamp();
+
+ /* Initialize the PDA fields holding references to other parts
+ of the memory. The content of such memory is still
+ undefined at the time of the call, we are only setting up
+ valid pointers to it. */
+ memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
+
+ cpu_pda[0].next = &cpu_pda[1];
+ cpu_pda[1].next = &cpu_pda[0];
+
+#ifdef CONFIG_EXCEPTION_L1_SCRATCH
+ cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
+ L1_SCRATCH_LENGTH);
+#else
+ cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
+#endif
+
+#ifdef CONFIG_SMP
+ cpu_pda[cpu].imask = 0x1f;
+#endif
+}
+
+void __init mem_init(void)
{
unsigned int codek = 0, datak = 0, initk = 0;
+ unsigned int reservedpages = 0, freepages = 0;
unsigned long tmp;
- unsigned int len = _ramend - _rambase;
unsigned long start_mem = memory_start;
unsigned long end_mem = memory_end;
start_mem = PAGE_ALIGN(start_mem);
max_mapnr = num_physpages = MAP_NR(high_memory);
- printk(KERN_INFO "Physical pages: %lx\n", num_physpages);
+ printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", num_physpages);
/* This will put all memory onto the freelists. */
totalram_pages = free_all_bootmem();
+ reservedpages = 0;
+ for (tmp = 0; tmp < max_mapnr; tmp++)
+ if (PageReserved(pfn_to_page(tmp)))
+ reservedpages++;
+ freepages = max_mapnr - reservedpages;
+
+ /* do not count in kernel image between _rambase and _ramstart */
+ reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT;
+#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
+ reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >> PAGE_SHIFT;
+#endif
+
codek = (_etext - _stext) >> 10;
- datak = (__bss_stop - __bss_start) >> 10;
initk = (__init_end - __init_begin) >> 10;
+ datak = ((_ramstart - _rambase) >> 10) - codek - initk;
- tmp = nr_free_pages() << PAGE_SHIFT;
printk(KERN_INFO
- "Memory available: %luk/%uk RAM, (%uk init code, %uk kernel code, %uk data, %uk dma)\n",
- tmp >> 10, len >> 10, initk, codek, datak, DMA_UNCACHED_REGION >> 10);
-
- /* Initialize the blackfin L1 Memory. */
- l1sram_init();
- l1_data_sram_init();
- l1_inst_sram_init();
-
- /* Allocate this once; never free it. We assume this gives us a
- pointer to the start of L1 scratchpad memory; panic if it
- doesn't. */
- tmp = (unsigned long)l1sram_alloc(sizeof(struct l1_scratch_task_info));
- if (tmp != (unsigned long)L1_SCRATCH_TASK_INFO) {
- printk(KERN_EMERG "mem_init(): Did not get the right address from l1sram_alloc: %08lx != %08lx\n",
- tmp, (unsigned long)L1_SCRATCH_TASK_INFO);
- panic("No L1, time to give up\n");
- }
+ "Memory available: %luk/%luk RAM, "
+ "(%uk init code, %uk kernel code, %uk data, %uk dma, %uk reserved)\n",
+ (unsigned long) freepages << (PAGE_SHIFT-10), _ramend >> 10,
+ initk, codek, datak, DMA_UNCACHED_REGION >> 10, (reservedpages << (PAGE_SHIFT-10)));
}
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
+static void __init free_init_pages(const char *what, unsigned long begin, 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)
-{
-#ifdef CONFIG_RAMKERNEL
unsigned long addr;
-/*
- * the following code should be cool even if these sections
- * are not page aligned.
- */
- addr = PAGE_ALIGN((unsigned long)(__init_begin));
/* next to check that the page we free is not a partial page */
- for (; addr + PAGE_SIZE < (unsigned long)(__init_end);
- addr += PAGE_SIZE) {
+ for (addr = begin; addr + PAGE_SIZE <= end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
- printk(KERN_NOTICE
- "Freeing unused kernel memory: %ldk freed (0x%x - 0x%x)\n",
- (addr - PAGE_ALIGN((long)__init_begin)) >> 10,
- (int)(PAGE_ALIGN((unsigned long)(__init_begin))),
- (int)(addr - PAGE_SIZE));
+ printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init free_initrd_mem(unsigned long start, unsigned long end)
+{
+#ifndef CONFIG_MPU
+ free_init_pages("initrd memory", start, end);
+#endif
+}
+#endif
+
+void __init_refok free_initmem(void)
+{
+#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
+ free_init_pages("unused kernel memory",
+ (unsigned long)(&__init_begin),
+ (unsigned long)(&__init_end));
#endif
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff