#include <linux/mc146818rtc.h>
#include <linux/cache.h>
#include <linux/interrupt.h>
-#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/bootmem.h>
& ~( voyager_extended_vic_processors
& voyager_allowed_boot_processors);
- /* For the 486, we can't use the 4Mb page table trick, so
- * must map a region of memory */
-#ifdef CONFIG_M486
- int i;
- unsigned long *page_table_copies = (unsigned long *)
- __get_free_page(GFP_KERNEL);
-#endif
- pgd_t orig_swapper_pg_dir0;
-
/* This is an area in head.S which was used to set up the
* initial kernel stack. We need to alter this to give the
* booting CPU a new stack (taken from its idle process) */
hijack_source.idt.Segment = (start_phys_address >> 4) & 0xFFFF;
cpucount++;
+ alternatives_smp_switch(1);
+
idle = fork_idle(cpu);
if(IS_ERR(idle))
panic("failed fork for CPU%d", cpu);
/* init_tasks (in sched.c) is indexed logically */
stack_start.esp = (void *) idle->thread.esp;
- /* Pre-allocate and initialize the CPU's GDT and PDA so it
- doesn't have to do any memory allocation during the
- delicate CPU-bringup phase. */
- if (!init_gdt(cpu, idle)) {
- printk(KERN_INFO "Couldn't allocate GDT/PDA for CPU %d\n", cpu);
- cpucount--;
- return;
- }
-
+ init_gdt(cpu, idle);
irq_ctx_init(cpu);
/* Note: Don't modify initial ss override */
VDEBUG(("VOYAGER SMP: Booting CPU%d at 0x%lx[%x:%x], stack %p\n", cpu,
(unsigned long)hijack_source.val, hijack_source.idt.Segment,
hijack_source.idt.Offset, stack_start.esp));
- /* set the original swapper_pg_dir[0] to map 0 to 4Mb transparently
- * (so that the booting CPU can find start_32 */
- orig_swapper_pg_dir0 = swapper_pg_dir[0];
-#ifdef CONFIG_M486
- if(page_table_copies == NULL)
- panic("No free memory for 486 page tables\n");
- for(i = 0; i < PAGE_SIZE/sizeof(unsigned long); i++)
- page_table_copies[i] = (i * PAGE_SIZE)
- | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT;
-
- ((unsigned long *)swapper_pg_dir)[0] =
- ((virt_to_phys(page_table_copies)) & PAGE_MASK)
- | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT;
-#else
- ((unsigned long *)swapper_pg_dir)[0] =
- (virt_to_phys(pg0) & PAGE_MASK)
- | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT;
-#endif
+
+ /* init lowmem identity mapping */
+ clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
+ min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));
+ flush_tlb_all();
if(quad_boot) {
printk("CPU %d: non extended Quad boot\n", cpu);
udelay(100);
}
/* reset the page table */
- swapper_pg_dir[0] = orig_swapper_pg_dir0;
- local_flush_tlb();
-#ifdef CONFIG_M486
- free_page((unsigned long)page_table_copies);
-#endif
+ zap_low_mappings();
if (cpu_booted_map) {
VDEBUG(("CPU%d: Booted successfully, back in CPU %d\n",
set_current(hard_get_current());
#endif
- /*
- * switch to the per CPU GDT we already set up
- * in do_boot_cpu()
- */
- cpu_set_gdt(current_thread_info()->cpu);
-
/*
* We don't actually need to load the full TSS,
* basically just the stack pointer and the eip.
}
}
-/* Call this function on all CPUs using the function_interrupt above
- <func> The function to run. This must be fast and non-blocking.
- <info> An arbitrary pointer to pass to the function.
- <retry> If true, keep retrying until ready.
- <wait> If true, wait until function has completed on other CPUs.
- [RETURNS] 0 on success, else a negative status code. Does not return until
- remote CPUs are nearly ready to execute <<func>> or are or have executed.
-*/
-int
-smp_call_function (void (*func) (void *info), void *info, int retry,
- int wait)
+static int
+__smp_call_function_mask (void (*func) (void *info), void *info, int retry,
+ int wait, __u32 mask)
{
struct call_data_struct data;
- __u32 mask = cpus_addr(cpu_online_map)[0];
mask &= ~(1<<smp_processor_id());
call_data = &data;
wmb();
/* Send a message to all other CPUs and wait for them to respond */
- send_CPI_allbutself(VIC_CALL_FUNCTION_CPI);
+ send_CPI(mask, VIC_CALL_FUNCTION_CPI);
/* Wait for response */
while (data.started)
return 0;
}
+
+/* Call this function on all CPUs using the function_interrupt above
+ <func> The function to run. This must be fast and non-blocking.
+ <info> An arbitrary pointer to pass to the function.
+ <retry> If true, keep retrying until ready.
+ <wait> If true, wait until function has completed on other CPUs.
+ [RETURNS] 0 on success, else a negative status code. Does not return until
+ remote CPUs are nearly ready to execute <<func>> or are or have executed.
+*/
+int
+smp_call_function(void (*func) (void *info), void *info, int retry,
+ int wait)
+{
+ __u32 mask = cpus_addr(cpu_online_map)[0];
+
+ return __smp_call_function_mask(func, info, retry, wait, mask);
+}
EXPORT_SYMBOL(smp_call_function);
+/*
+ * smp_call_function_single - Run a function on another CPU
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @nonatomic: Currently unused.
+ * @wait: If true, wait until function has completed on other CPUs.
+ *
+ * Retrurns 0 on success, else a negative status code.
+ *
+ * Does not return until the remote CPU is nearly ready to execute <func>
+ * or is or has executed.
+ */
+
+int
+smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+ int nonatomic, int wait)
+{
+ __u32 mask = 1 << cpu;
+
+ return __smp_call_function_mask(func, info, nonatomic, wait, mask);
+}
+EXPORT_SYMBOL(smp_call_function_single);
+
/* Sorry about the name. In an APIC based system, the APICs
* themselves are programmed to send a timer interrupt. This is used
* by linux to reschedule the processor. Voyager doesn't have this,
projects / linux-drm-fsl-dcu.git / blobdiff