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https://github.com/projectacrn/acrn-hypervisor.git
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95a9f6d9a0
Currently, memory with size of 'CONFIG_LOW_RAM_SIZE' will be allocated when 'get_direct_boot_ap_trampoline()' is called. This patch refine the implementation of of above function, it returns the base address of trampoline buffer when called, and the memory is allocated when vboot module is initialized. Tracked-On: #3992 Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
51 lines
979 B
C
51 lines
979 B
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/* this is for direct guest_boot method */
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#include <types.h>
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#include <e820.h>
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#include <cpu.h>
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#include <direct_boot.h>
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/*AP trampoline code buffer base address.*/
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static uint64_t ap_trampoline_buf;
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static void init_direct_boot(void)
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{
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if (ap_trampoline_buf == 0UL) {
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ap_trampoline_buf = e820_alloc_low_memory(CONFIG_LOW_RAM_SIZE);
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}
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}
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/* @post: return != 0UL */
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static uint64_t get_direct_boot_ap_trampoline(void)
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{
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return ap_trampoline_buf;
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}
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static void* get_direct_boot_rsdp(void)
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{
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return NULL;
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}
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static void init_direct_boot_irq(void)
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{
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CPU_IRQ_ENABLE();
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}
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static struct vboot_operations direct_boot_ops = {
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.init = init_direct_boot,
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.get_ap_trampoline = get_direct_boot_ap_trampoline,
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.get_rsdp = get_direct_boot_rsdp,
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.init_irq = init_direct_boot_irq,
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};
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struct vboot_operations* get_direct_boot_ops(void)
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{
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return &direct_boot_ops;
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}
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