summaryrefslogtreecommitdiff
path: root/src/arch/i386/smp/start_stop.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/arch/i386/smp/start_stop.c')
-rw-r--r--src/arch/i386/smp/start_stop.c240
1 files changed, 0 insertions, 240 deletions
diff --git a/src/arch/i386/smp/start_stop.c b/src/arch/i386/smp/start_stop.c
deleted file mode 100644
index bf26437984..0000000000
--- a/src/arch/i386/smp/start_stop.c
+++ /dev/null
@@ -1,240 +0,0 @@
-#include <smp/start_stop.h>
-#include <arch/smp/mpspec.h>
-#include <cpu/p6/apic.h>
-#include <delay.h>
-#include <string.h>
-#include <console/console.h>
-#include <arch/smp/lapic.h>
-#include <arch/hlt.h>
-
-
-unsigned long this_processors_id(void)
-{
- return lapicid();
-}
-
-int processor_index(unsigned long apicid)
-{
- int i;
- for(i = 0; i < CONFIG_MAX_CPUS; i++) {
- if (initial_apicid[i] == apicid) {
- return i;
- }
- }
- return -1;
-}
-
-void stop_cpu(unsigned long apicid)
-{
- int timeout;
- unsigned long send_status;
-
- /* send an APIC INIT to myself */
- apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
- apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT | APIC_DM_INIT);
-
- /* wait for the ipi send to finish */
- printk_spew("Waiting for send to finish...\n");
- timeout = 0;
- do {
- printk_spew("+");
- udelay(100);
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- } while (send_status && (timeout++ < 1000));
- if (timeout >= 1000) {
- printk_err("timed out\n");
- }
- mdelay(10);
-
- printk_spew("Deasserting INIT.\n");
- /* Deassert the APIC INIT */
- apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
- apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT);
-
- printk_spew("Waiting for send to finish...\n");
- timeout = 0;
- do {
- printk_spew("+");
- udelay(100);
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- } while (send_status && (timeout++ < 1000));
- if (timeout >= 1000) {
- printk_err("timed out\n");
- }
-
- while(1) {
- hlt();
- }
-}
-
-/* This is a lot more paranoid now, since Linux can NOT handle
- * being told there is a CPU when none exists. So any errors
- * will return 0, meaning no CPU.
- *
- * We actually handling that case by noting which cpus startup
- * and not telling anyone about the ones that dont.
- */
-int start_cpu(unsigned long apicid)
-{
- int timeout;
- unsigned long send_status, accept_status, start_eip;
- int j, num_starts, maxlvt;
- extern char _secondary_start[];
-
- /*
- * Starting actual IPI sequence...
- */
-
- printk_spew("Asserting INIT.\n");
-
- /*
- * Turn INIT on target chip
- */
- apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
-
- /*
- * Send IPI
- */
-
- apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT
- | APIC_DM_INIT);
-
- printk_spew("Waiting for send to finish...\n");
- timeout = 0;
- do {
- printk_spew("+");
- udelay(100);
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- } while (send_status && (timeout++ < 1000));
- if (timeout >= 1000) {
- printk_err("CPU %d: First apic write timed out. Disabling\n",
- apicid);
- // too bad.
- printk_err("ESR is 0x%x\n", apic_read(APIC_ESR));
- if (apic_read(APIC_ESR)) {
- printk_err("Try to reset ESR\n");
- apic_write_around(APIC_ESR, 0);
- printk_err("ESR is 0x%x\n", apic_read(APIC_ESR));
- }
- return 0;
- }
- mdelay(10);
-
- printk_spew("Deasserting INIT.\n");
-
- /* Target chip */
- apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
-
- /* Send IPI */
- apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT);
-
- printk_spew("Waiting for send to finish...\n");
- timeout = 0;
- do {
- printk_spew("+");
- udelay(100);
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- } while (send_status && (timeout++ < 1000));
- if (timeout >= 1000) {
- printk_err("CPU %d: Second apic write timed out. Disabling\n",
- apicid);
- // too bad.
- return 0;
- }
-
- start_eip = (unsigned long)_secondary_start;
- printk_spew("start_eip=0x%08lx\n", start_eip);
-
- num_starts = 2;
-
- /*
- * Run STARTUP IPI loop.
- */
- printk_spew("#startup loops: %d.\n", num_starts);
-
- maxlvt = 4;
-
- for (j = 1; j <= num_starts; j++) {
- printk_spew("Sending STARTUP #%d to %u.\n", j, apicid);
- apic_read_around(APIC_SPIV);
- apic_write(APIC_ESR, 0);
- apic_read(APIC_ESR);
- printk_spew("After apic_write.\n");
-
- /*
- * STARTUP IPI
- */
-
- /* Target chip */
- apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
-
- /* Boot on the stack */
- /* Kick the second */
- apic_write_around(APIC_ICR, APIC_DM_STARTUP
- | (start_eip >> 12));
-
- /*
- * Give the other CPU some time to accept the IPI.
- */
- udelay(300);
-
- printk_spew("Startup point 1.\n");
-
- printk_spew("Waiting for send to finish...\n");
- timeout = 0;
- do {
- printk_spew("+");
- udelay(100);
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- } while (send_status && (timeout++ < 1000));
-
- /*
- * Give the other CPU some time to accept the IPI.
- */
- udelay(200);
- /*
- * Due to the Pentium erratum 3AP.
- */
- if (maxlvt > 3) {
- apic_read_around(APIC_SPIV);
- apic_write(APIC_ESR, 0);
- }
- accept_status = (apic_read(APIC_ESR) & 0xEF);
- if (send_status || accept_status)
- break;
- }
- printk_spew("After Startup.\n");
- if (send_status)
- printk_warning("APIC never delivered???\n");
- if (accept_status)
- printk_warning("APIC delivery error (%lx).\n", accept_status);
- if (send_status || accept_status)
- return 0;
- return 1;
-}
-
-
-void startup_other_cpus(unsigned long *processor_map)
-{
- unsigned long apicid = this_processors_id();
- int i;
-
- /* Assume the cpus are densly packed by apicid */
- for(i = 0; i < CONFIG_MAX_CPUS; i++) {
- unsigned long cpu_apicid = initial_apicid[i];
- if (cpu_apicid == -1) {
- printk_err("CPU %d not found\n",i);
- processor_map[i] = 0;
- continue;
- }
- if (cpu_apicid == apicid ) {
- continue;
- }
- if (!start_cpu(cpu_apicid)) {
- /* Put an error in processor_map[i]? */
- printk_err("CPU %d/%u would not start!\n",
- i, cpu_apicid);
- processor_map[i] = 0;
- }
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-30 07:12:21 +0000