e03d4196a3
Move common logic into a default routine in platform/power that other platforms can reuse to implement the general default shutdown logic. Add helper routines to print the cause. Refactor the platforms that had substantial halt logic to reuse the default implementation.
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*
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* Copyright (c) 2018 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <inttypes.h>
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#include <lk/err.h>
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#include <lk/main.h>
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#include <lk/reg.h>
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#include <lk/trace.h>
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#include <kernel/thread.h>
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#include <platform.h>
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#include <platform/interrupts.h>
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#include <platform/debug.h>
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#include <platform/timer.h>
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#include <platform/jh7110.h>
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#include <sys/types.h>
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#include <lib/fdtwalk.h>
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#include <dev/bus/pci.h>
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#include <dev/interrupt/riscv_plic.h>
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#if WITH_LIB_MINIP
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#include <lib/minip.h>
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#endif
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#include <kernel/vm.h>
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#include "platform_p.h"
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#define LOCAL_TRACE 0
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static const void *fdt;
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static volatile uint32_t *power_reset_reg;
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void platform_early_init(void) {
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TRACE;
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plic_early_init(PLIC_BASE_VIRT, NUM_IRQS, true);
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LTRACEF("starting FDT scan\n");
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/* look for a flattened device tree in the second arg passed to us */
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fdt = (void *)lk_boot_args[1];
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fdt = (const void *)((uintptr_t)fdt + PERIPHERAL_BASE_VIRT);
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if (LOCAL_TRACE) {
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LTRACEF("dumping FDT at %p\n", fdt);
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fdt_walk_dump(fdt);
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}
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// detect physical memory layout from the device tree
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fdtwalk_setup_memory(fdt, lk_boot_args[1], MEMORY_BASE_PHYS, MEMSIZE);
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// detect secondary cores to start
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fdtwalk_setup_cpus_riscv(fdt);
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LTRACEF("done scanning FDT\n");
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/* save a copy of the pointer to the poweroff/reset register */
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/* TODO: read it from the FDT */
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power_reset_reg = paddr_to_kvaddr(0x100000);
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}
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void platform_init(void) {
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plic_init();
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uart_init();
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// TODO: fix this, seems to read all zeros from the ecam
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#if 0
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/* configure and start pci from device tree */
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status_t err = fdtwalk_setup_pci(fdt);
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if (err >= NO_ERROR) {
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// start the bus manager
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pci_bus_mgr_init();
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// assign resources to all devices in case they need it
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pci_bus_mgr_assign_resources();
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}
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#endif
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}
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static void reboot_(void) {
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sbi_system_reset(SBI_RESET_TYPE_COLD_REBOOT, SBI_RESET_REASON_NONE);
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*power_reset_reg = 0x7777;
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}
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static void shutdown_(void) {
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// try to use sbi as a cleaner way to stop
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sbi_system_reset(SBI_RESET_TYPE_SHUTDOWN, SBI_RESET_REASON_NONE);
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*power_reset_reg = 0x5555;
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}
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void platform_halt(platform_halt_action suggested_action, platform_halt_reason reason) {
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// Use the default halt implementation using sbi as the reset and shutdown implementation.
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platform_halt_default(suggested_action, reason, &reboot_, &shutdown_);
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}
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status_t platform_pci_int_to_vector(unsigned int pci_int, unsigned int *vector) {
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// at the moment there's no translation between PCI IRQs and native irqs
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*vector = pci_int;
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return NO_ERROR;
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}
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status_t platform_allocate_interrupts(size_t count, uint align_log2, bool msi, unsigned int *vector) {
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return ERR_NOT_SUPPORTED;
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}
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status_t platform_compute_msi_values(unsigned int vector, unsigned int cpu, bool edge,
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uint64_t *msi_address_out, uint16_t *msi_data_out) {
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return ERR_NOT_SUPPORTED;
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}
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