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https://github.com/projectacrn/acrn-hypervisor.git
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834a1f8b97
Bare boot protocol is a protocol to be used when there are no protocols (such as multiboot1/2) are available: ACRN have no way to know where its modules are being loaded, how large they are, and what are their command line arguments. Bare boot protocol allows you to pre-configure (hard-code) modules' address and sizes. ACRN will find modules based on the pre-configured information without the need of a bootloader passing information to it. Tracked-On: #8838 Signed-off-by: Yifan Liu <yifan1.liu@intel.com> Acked-by: Wang Yu1 <yu1.wang@intel.com>
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/*
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* Copyright (C) 2025 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/**
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* Bare boot mode is useful when we run on platforms that
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* does not support multiboot. Bare boot allows you to pre-configure
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* ACRN boot components in compile time.
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*/
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#include <types.h>
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#include <boot.h>
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#include <bare.h>
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#include <rtl.h>
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#include <pgtable.h>
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#include <logmsg.h>
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static struct bare_boot_option *options;
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static uint16_t nmods;
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uint16_t get_mod_count()
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{
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return nmods;
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}
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void *get_mod_addr(uint16_t mod_idx)
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{
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void *ret = NULL;
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if (mod_idx < nmods) {
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ret = hpa2hva_early(options[mod_idx].addr);
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}
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return ret;
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}
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uint64_t get_mod_size(uint16_t mod_idx)
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{
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uint64_t ret = 0;
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if (mod_idx < nmods) {
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ret = options[mod_idx].size;
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}
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return ret;
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}
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const char *get_mod_tag(uint16_t mod_idx)
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{
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const char *ret = NULL;
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if (mod_idx < nmods) {
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ret = options[mod_idx].tag;
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}
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return ret;
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}
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int32_t init_bare_boot_info()
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{
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extern struct bare_boot_option bare_boot_options[];
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extern uint16_t n_bare_boot_options;
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struct acrn_boot_info *abi = get_acrn_boot_info();
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struct abi_module *m;
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const char *tag;
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int i;
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(void)strncpy_s((void *)abi->protocol_name, MAX_PROTOCOL_NAME_SIZE,
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"Bare boot", (MAX_PROTOCOL_NAME_SIZE - 1U));
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(void)strncpy_s((void *)(abi->loader_name), MAX_LOADER_NAME_SIZE,
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"Bare boot Loader", (MAX_LOADER_NAME_SIZE - 1U));
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options = bare_boot_options;
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nmods = n_bare_boot_options;
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if (nmods > MAX_MODULE_NUM) {
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pr_err("Bareboot: Too many boot modules (%d found)", nmods);
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pr_err("Bareboot: Accepting only %d, ignoring rest", MAX_MODULE_NUM);
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nmods = MAX_MODULE_NUM;
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}
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abi->mods_count = nmods;
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for (i = 0; i < nmods; i++) {
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m = &(abi->mods[i]);
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m->start = get_mod_addr(i);
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m->size = get_mod_size(i);
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tag = get_mod_tag(i);
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(void)strncpy_s((void *)(m->string), MAX_MOD_STRING_SIZE,
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tag, strnlen_s(tag, MAX_MOD_STRING_SIZE));
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}
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return 0;
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}
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