errval_t pcie_setup_confspace(void) {
errval_t err;
uint64_t address;
uint16_t segment;
uint8_t sbus;
uint8_t ebus;
struct acpi_rpc_client* cl = get_acpi_rpc_client();
cl->vtbl.get_pcie_confspace(cl, &err, &address, &segment, &sbus, &ebus);
if (err_is_ok(err)) {
size_t region_pages = (ebus + 1 - sbus) << 8;
size_t region_bytes = region_pages * BASE_PAGE_SIZE;
uint8_t region_bits = log2ceil(region_bytes);
struct capref pcie_cap;
struct acpi_rpc_client* acl = get_acpi_rpc_client();
errval_t error_code;
err = acl->vtbl.mm_alloc_range_proxy(acl, region_bits, address,
address + (1UL << region_bits), &pcie_cap, &error_code);
if (err_is_fail(err)) {
return err;
}
if (err_is_fail(error_code)) {
return error_code;
}
PCI_DEBUG("calling confspace init with: %"PRIu64", %"PRIu16", %"PRIu8", %"PRIu8"",
address, segment, sbus, ebus);
int r = pcie_confspace_init(pcie_cap, address, segment, sbus, ebus);
assert(r == 0);
}
return err;
}
int start_aps_x86_32_start(uint8_t core_id, genvaddr_t entry)
{
DEBUG("%s:%d: start_aps_x86_32_start\n", __FILE__, __LINE__);
// Copy the startup code to the real-mode address
uint8_t *real_src = (uint8_t *) &x86_32_start_ap;
uint8_t *real_end = (uint8_t *) &x86_32_start_ap_end;
struct capref bootcap;
struct acpi_rpc_client* acl = get_acpi_rpc_client();
errval_t error_code;
errval_t err = acl->vtbl.mm_realloc_range_proxy(acl, 16, 0x0,
&bootcap, &error_code);
if (err_is_fail(err)) {
USER_PANIC_ERR(err, "mm_alloc_range_proxy failed.");
}
if (err_is_fail(error_code)) {
USER_PANIC_ERR(error_code, "mm_alloc_range_proxy return failed.");
}
void* real_base;
err = vspace_map_one_frame(&real_base, 1<<16, bootcap, NULL, NULL);
uint8_t* real_dest = (uint8_t*)real_base + X86_32_REAL_MODE_LINEAR_OFFSET;
memcpy(real_dest, real_src, real_end - real_src);
/* Pointer to the entry point called from init_ap.S */
volatile uint64_t *absolute_entry_ptr = (volatile uint64_t *)
((
(lpaddr_t) &x86_32_init_ap_absolute_entry -
(lpaddr_t) &x86_32_start_ap
)
+
real_dest);
//copy the address of the function start (in boot.S) to the long-mode
//assembler code to be able to perform an absolute jump
*absolute_entry_ptr = entry;
// pointer to the shared global variable amongst all kernels
volatile uint64_t *ap_global = (volatile uint64_t *)
((
(lpaddr_t) &x86_32_init_ap_global -
(lpaddr_t) &x86_32_start_ap
)
+ real_dest);
genpaddr_t global;
struct monitor_blocking_rpc_client *mc =
get_monitor_blocking_rpc_client();
err = mc->vtbl.get_global_paddr(mc, &global);
if (err_is_fail(err)) {
DEBUG_ERR(err, "invoke spawn core");
return err_push(err, MON_ERR_SPAWN_CORE);
}
*ap_global = (uint64_t)(genpaddr_t)global;
// pointer to the pseudo-lock used to detect boot up of new core
volatile uint32_t *ap_wait = (volatile uint32_t *)
((lpaddr_t) &x86_32_init_ap_wait -
((lpaddr_t) &x86_32_start_ap) +
real_dest);
// Pointer to the lock variable in the realmode code
volatile uint8_t *ap_lock = (volatile uint8_t *)
((lpaddr_t) &x86_32_init_ap_lock -
((lpaddr_t) &x86_32_start_ap) +
real_dest);
*ap_wait = AP_STARTING_UP;
end = bench_tsc();
err = invoke_send_init_ipi(ipi_cap, core_id);
if (err_is_fail(err)) {
DEBUG_ERR(err, "invoke send init ipi");
return err;
}
err = invoke_send_start_ipi(ipi_cap, core_id, entry);
if (err_is_fail(err)) {
DEBUG_ERR(err, "invoke sipi");
return err;
}
//give the new core a bit time to start-up and set the lock
for (uint64_t i = 0; i < STARTUP_TIMEOUT; i++) {
if (*ap_lock != 0) {
break;
}
}
// If the lock is set, the core has been started, otherwise assume, that
// a core with this APIC ID doesn't exist.
if (*ap_lock != 0) {
while (*ap_wait != AP_STARTED);
trace_event(TRACE_SUBSYS_KERNEL, TRACE_EVENT_KERNEL_CORE_START_REQUEST_ACK, core_id);
*ap_lock = 0;
return 0;
}
assert(!"badness");
return -1;
}