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#include <smp/smp.h>
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#include <smp/smp.h>
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#include <genarch/ofw/ofw_tree.h>
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#include <genarch/ofw/ofw_tree.h>
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#include <cpu.h>
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#include <cpu.h>
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#include <arch/cpu.h>
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#include <arch/cpu.h>
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#include <arch/boot/boot.h>
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#include <arch.h>
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#include <arch.h>
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#include <config.h>
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#include <config.h>
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#include <macros.h>
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#include <macros.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <synch/synch.h>
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#include <synch/synch.h>
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#include <synch/waitq.h>
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#include <synch/waitq.h>
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#include <print.h>
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#include <print.h>
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#include <arch/sun4v/hypercall.h>
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#include <arch/sun4v/md.h>
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#include <time/delay.h>
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#define CPU_STATE_RUNNING   2
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extern void kernel_image_start(void);
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extern void *trap_table;
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/** Determine number of processors. */
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/** Determine number of processors. */
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void smp_init(void)
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void smp_init(void)
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{
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{
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    md_node_t node = md_get_root();
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    count_t cpu_count = 0;
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    // TODO: replace with a real # of CPUs as soon as the MD walkthrough is implemented
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    /* walk through MD, find the current CPU node & its clock-frequency */
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    while(md_next_node(&node, "cpu")) {
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        cpu_count++;
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    }
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    config.cpu_count = 1;
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    config.cpu_count = cpu_count;
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}
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}
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/** Wake application processors up. */
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/** Wake application processors up. */
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void kmp(void *arg)
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void kmp(void *arg)
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{
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{
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    (void) arg;
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    uint64_t myid;
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    __hypercall_fast_ret1(0, 0, 0, 0, 0, CPU_MYID, &myid);
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    // TODO: implement as soon as the MD walkthrough is implemented
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    /* stop the CPUs before making them execute our code */
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    uint64_t i;
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    for (i = 0; i < config.cpu_count; i++) {
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        if (i == myid)
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            continue;
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        if (__hypercall_fast1(CPU_STOP, i) != 0)
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            continue;
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        uint64_t state;
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        __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
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        while (state == CPU_STATE_RUNNING) {
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            __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
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        }
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    }
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    /* wake the processors up, one by one */
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    uint64_t state;
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    for (i = 1; i < config.cpu_count; i++) {
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        __hypercall_fast_ret1(i, 0, 0, 0, 0, CPU_STATE, &state);
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        printf("Starting CPU %d, error code = %d.\n", i, __hypercall_fast4(
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            CPU_START,
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            i,
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            (uint64_t) KA2PA(kernel_image_start),
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            KA2PA(trap_table),
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            bootinfo.physmem_start         
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        ));
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        if (waitq_sleep_timeout(&ap_completion_wq, 10000000, SYNCH_FLAGS_NONE) ==
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                    ESYNCH_TIMEOUT)
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            printf("%s: waiting for processor (cpuid = %" PRIu32
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                ") timed out\n", __func__, i);
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    }
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}
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}
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/** @}
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/** @}
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 */
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 */