#include <linux/bootmem.h>
#include <linux/uaccess.h>
#include <asm/bfin-global.h>
-#include <asm/l1layout.h>
+#include <asm/pda.h>
+#include <asm/cplbinit.h>
#include "blackfin_sram.h"
/*
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);
-}
+extern unsigned long exception_stack[NR_CPUS][1024];
+
+struct blackfin_pda cpu_pda[NR_CPUS];
+EXPORT_SYMBOL(cpu_pda);
/*
* paging_init() continues the virtual memory environment setup which
}
}
+asmlinkage void __init init_pda(void)
+{
+ unsigned int cpu = raw_smp_processor_id();
+
+ /* 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];
+
+ cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
+
+#ifdef CONFIG_SMP
+ cpu_pda[cpu].imask = 0x1f;
+#endif
+}
+
+void __cpuinit reserve_pda(void)
+{
+ printk(KERN_INFO "PDA for CPU%u reserved at %p\n", smp_processor_id(),
+ &cpu_pda[smp_processor_id()]);
+}
+
void __init mem_init(void)
{
unsigned int codek = 0, datak = 0, initk = 0;
"(%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)));
+}
+static int __init sram_init(void)
+{
/* 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");
- }
+ bfin_sram_init();
+
+ /* Reserve the PDA space for the boot CPU right after we
+ * initialized the scratch memory allocator.
+ */
+ reserve_pda();
+ return 0;
}
+pure_initcall(sram_init);
-static __init void free_init_pages(const char *what, unsigned long begin, unsigned long end)
+static void __init free_init_pages(const char *what, unsigned long begin, unsigned long end)
{
unsigned long addr;
/* next to check that the page we free is not a partial page */
}
#endif
-void __init free_initmem(void)
+void __init_refok free_initmem(void)
{
#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
free_init_pages("unused kernel memory",