revert r354714 "Boot arm64 kernel using booti command from U-boot."
After discussing with mmel@, it was clear this is insufficient to address all the needs. mmel@ will commit his original patch, from https://reviews.freebsd.org/D13861, and the additions needed from r354714 will be made afterward. Requested by: mmel Sponsored by: Juniper Networks, Inc.
This commit is contained in:
Justin Hibbits
parent
c47b170b02
commit
750d951f5a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=355289
@ -54,29 +54,6 @@
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.text
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.globl _start
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_start:
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#ifdef LINUX_BOOT_ABI
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/*
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* See Documentation/arm64/booting.txt in the Linux kernel.
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* This is needed to boot using U-Boot's booti command.
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*/
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#define BOOTI_MAGIC 0x644d5241
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#define UBOOT_IMAGE_OFFSET 0
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#define UBOOT_IMAGE_SIZE _end - _start
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#define UBOOT_IMAGE_FLAGS 0
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b 1f /* Executable code */
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.long 0 /* Executable code */
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.quad UBOOT_IMAGE_OFFSET /* Image load offset, little endian */
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.quad UBOOT_IMAGE_SIZE /* Effective Image size, little endian */
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.quad UBOOT_IMAGE_FLAGS /* kernel flags, little endian */
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.quad 0 /* reserved */
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.quad 0 /* reserved */
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.quad 0 /* reserved */
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.long BOOTI_MAGIC /* Magic number, little endian, "ARM\x64" */
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.long 0 /* reserved (used for PE COFF offset) */
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1:
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#endif
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/* Drop to EL1 */
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bl drop_to_el1
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@ -371,25 +348,15 @@ create_pagetables:
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* Build the TTBR1 maps.
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*/
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/* Find the size of the kernel */
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mov x6, #(KERNBASE)
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and x7, x0, x6
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cmp x7, x6
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b.eq 1f
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/* booted from U-Boot */
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ldr x7, .Lend
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sub x8, x7, x6 /* kernel size = end - begin */
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b 2f
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1:
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/* booted from FreeBSD loader */
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sub x8, x0, x6 /* size = modulep - begin */
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/* Find modulep - begin */
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sub x8, x0, x6
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/* Add two 2MiB pages for the module data and round up */
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ldr x7, =(3 * L2_SIZE - 1)
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add x8, x8, x7
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2:
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/* Get the number of l2 pages to allocate, rounded down */
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lsr x10, x8, #(L2_SHIFT)
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/* Add 1 to get actual count */
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add x10, x10, #1
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/* Create the kernel space L2 table */
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mov x6, x26
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@ -964,16 +964,6 @@ try_load_dtb(caddr_t kmdp)
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vm_offset_t dtbp;
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dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
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#if defined(FDT_DTB_STATIC)
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/*
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* In case the device tree blob was not retrieved (from metadata) try
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* to use the statically embedded one.
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*/
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if (dtbp == 0)
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dtbp = (vm_offset_t)&fdt_static_dtb;
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#endif
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if (dtbp == (vm_offset_t)NULL) {
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printf("ERROR loading DTB\n");
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return;
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@ -1077,26 +1067,6 @@ cache_setup(void)
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}
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}
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static vm_offset_t
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freebsd_parse_boot_param(struct arm64_bootparams *abp)
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{
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vm_offset_t lastaddr;
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void *kmdp;
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static char *loader_envp;
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preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
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kmdp = preload_search_by_type("elf kernel");
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if (kmdp == NULL)
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return (0);
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boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
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loader_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
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init_static_kenv(loader_envp, 0);
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lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
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return (lastaddr);
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}
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void
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initarm(struct arm64_bootparams *abp)
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{
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@ -1112,32 +1082,27 @@ initarm(struct arm64_bootparams *abp)
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caddr_t kmdp;
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bool valid;
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if ((abp->modulep & VM_MIN_KERNEL_ADDRESS) ==
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VM_MIN_KERNEL_ADDRESS)
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/* Booted from loader. */
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lastaddr = freebsd_parse_boot_param(abp);
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#ifdef LINUX_BOOT_ABI
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else
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/* Booted from U-Boot. */
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lastaddr = linux_parse_boot_param(abp);
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#endif
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/* Set the module data location */
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preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
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/* Find the kernel address */
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kmdp = preload_search_by_type("elf kernel");
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if (kmdp == NULL)
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kmdp = preload_search_by_type("elf64 kernel");
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boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
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init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
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link_elf_ireloc(kmdp);
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#ifdef FDT
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try_load_dtb(kmdp);
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#ifdef LINUX_BOOT_ABI
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parse_bootargs(&lastaddr, abp);
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#endif
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#endif
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efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
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/* Find the address to start allocating from */
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lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
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/* Load the physical memory ranges */
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efihdr = (struct efi_map_header *)preload_search_info(kmdp,
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MODINFO_METADATA | MODINFOMD_EFI_MAP);
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@ -1,330 +0,0 @@
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/*-
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* Copyright (c) 2019 Juniper Networks, Inc
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* Copyright (c) 2004 Olivier Houchard
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* Copyright (c) 1994-1998 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "opt_platform.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ctype.h>
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#include <sys/linker.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <machine/cpu.h>
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#include <machine/machdep.h>
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#include <machine/metadata.h>
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#include <machine/vmparam.h>
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#ifdef FDT
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#include <contrib/libfdt/libfdt.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_subr.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/pte.h>
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#include <machine/vm.h>
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#include <sys/boot.h>
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#endif
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#ifdef FDT
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#define PRELOAD_PUSH_VALUE(type, value) do { \
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*(type *)(preload_ptr + preload_size) = (value); \
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preload_size += sizeof(type); \
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} while (0)
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#define PRELOAD_PUSH_STRING(str) do { \
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uint32_t ssize; \
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ssize = strlen(str) + 1; \
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PRELOAD_PUSH_VALUE(uint32_t, ssize); \
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strcpy((char*)(preload_ptr + preload_size), str); \
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preload_size += ssize; \
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preload_size = roundup(preload_size, sizeof(u_long)); \
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} while (0)
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static int build_l2_block_pagetable(vm_offset_t, uint64_t,
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struct arm64_bootparams *);
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#define INITRD_START "linux,initrd-start"
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#define INITRD_END "linux,initrd-end"
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#define KENV_SIZE 2048
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static char static_kenv[KENV_SIZE];
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static caddr_t metadata_endptr;
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#endif
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#define PMAP_BOOTSTRAP_PAGES 2
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extern vm_offset_t end;
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/*
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* Fake up a boot descriptor table
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*/
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static vm_offset_t
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fake_preload_metadata(void *dtb_ptr, size_t dtb_size,
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struct arm64_bootparams *abp)
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{
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vm_offset_t lastaddr;
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static char fake_preload[256];
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caddr_t preload_ptr;
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size_t preload_size;
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preload_ptr = (caddr_t)&fake_preload[0];
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preload_size = 0;
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PRELOAD_PUSH_VALUE(uint32_t, MODINFO_NAME);
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PRELOAD_PUSH_STRING("kernel");
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PRELOAD_PUSH_VALUE(uint32_t, MODINFO_TYPE);
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PRELOAD_PUSH_STRING("elf kernel");
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PRELOAD_PUSH_VALUE(uint32_t, MODINFO_ADDR);
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PRELOAD_PUSH_VALUE(uint32_t, sizeof(vm_offset_t));
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PRELOAD_PUSH_VALUE(uint64_t, VM_MIN_KERNEL_ADDRESS);
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PRELOAD_PUSH_VALUE(uint32_t, MODINFO_SIZE);
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PRELOAD_PUSH_VALUE(uint32_t, sizeof(size_t));
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PRELOAD_PUSH_VALUE(uint64_t, (size_t)(&end - VM_MIN_KERNEL_ADDRESS));
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lastaddr = (vm_offset_t)&end;
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lastaddr = roundup(lastaddr, sizeof(vm_offset_t));
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#ifdef FDT
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if (dtb_ptr != NULL &&
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(build_l2_block_pagetable(lastaddr, dtb_size, abp) == 0)) {
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/* Copy DTB to KVA space and insert it into module chain. */
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PRELOAD_PUSH_VALUE(uint32_t, MODINFO_METADATA | MODINFOMD_DTBP);
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PRELOAD_PUSH_VALUE(uint32_t, sizeof(uint64_t));
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PRELOAD_PUSH_VALUE(uint64_t, (uint64_t)lastaddr);
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memmove((void *)lastaddr, dtb_ptr, dtb_size);
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lastaddr += dtb_size;
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}
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lastaddr = roundup(lastaddr, sizeof(vm_offset_t));
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/* End marker */
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metadata_endptr = preload_ptr;
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#endif
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PRELOAD_PUSH_VALUE(uint32_t, 0);
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PRELOAD_PUSH_VALUE(uint32_t, 0);
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preload_metadata = fake_preload;
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return (lastaddr);
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}
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/*
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* Support booting from U-Boot's booti command. If modulep (register x0)
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* is a valid address then it is a pointer to FDT.
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*/
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vm_offset_t
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linux_parse_boot_param(struct arm64_bootparams *abp)
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{
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uint32_t dtb_size = 0;
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struct fdt_header *dtb_ptr = NULL;
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#if defined(FDT) && !defined(FDT_DTB_STATIC)
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/* Test if modulep (x0) point to valid DTB. */
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dtb_ptr = (struct fdt_header *)abp->modulep;
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if (dtb_ptr && fdt_check_header(dtb_ptr) == 0)
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dtb_size = fdt_totalsize(dtb_ptr);
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#endif
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return (fake_preload_metadata(dtb_ptr, dtb_size, abp));
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}
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#ifdef FDT
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/*
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* Builds count 2 MiB page table entries.
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* During startup, locore.S maps kernel memory in L2 page table.
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* Create space to copy size bytes following the kernel memory.
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* See build_l2_block_pagetable in locore.S
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*/
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static int
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build_l2_block_pagetable(vm_offset_t lastaddr, uint64_t size,
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struct arm64_bootparams *abp)
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{
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vm_offset_t l2_block_entry, *l2pt_entry;
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int32_t count_2mib;
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volatile uint64_t output_bits;
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/* Number of 2MiB pages */
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count_2mib = ((lastaddr - KERNBASE) + size) >> L2_SHIFT;
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/* All the memory must not cross a 1GiB boundary */
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if (count_2mib >= Ln_ENTRIES) {
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printf("%s: Adding %#lx bytes makes kernel cross 1GiB boundary\n",
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__FUNCTION__, size);
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return EINVAL;
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}
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/* size fits within the last 2MiB page table entry */
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if (((lastaddr - KERNBASE) >> L2_SHIFT) == count_2mib)
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return 0;
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/* Build the L2 block entry */
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l2_block_entry = ATTR_IDX(VM_MEMATTR_WRITE_BACK) | L2_BLOCK | ATTR_AF;
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#ifdef SMP
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l2_block_entry |= ATTR_SH(ATTR_SH_IS);
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#endif
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/* Number of 2MiB pages mapped to kernel */
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count_2mib = (lastaddr - KERNBASE) >> L2_SHIFT;
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/* Go to last L2 page table entry. Each pagetable entry is 8 bytes */
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l2pt_entry = (vm_offset_t*)((abp->kern_l1pt - PAGE_SIZE) +
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(count_2mib << 3));
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output_bits = (*l2pt_entry++ >> L2_SHIFT) + 1;
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/* Build count 2MiB page table entries */
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for (count_2mib = size >> L2_SHIFT; count_2mib >= 0;
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l2pt_entry++, output_bits++, count_2mib--)
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*l2pt_entry = (output_bits << L2_SHIFT) | l2_block_entry;
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return 0;
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}
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/*
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* Align start addr to 1GiB boundary and build L1 page table entry for it.
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* See build_l1_block_pagetable in locore.S
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*/
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static void
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build_l1_block_pagetable(vm_offset_t start, struct arm64_bootparams *abp)
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{
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vm_offset_t l1_table_idx, l1_block_entry, phy_addr, *l1_table_entry;
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/* Find the table index */
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l1_table_idx = (start >> L1_SHIFT) & Ln_ADDR_MASK;
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/* Build the L1 block entry */
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l1_block_entry = ATTR_nG | ATTR_IDX(VM_MEMATTR_UNCACHEABLE) |
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L1_BLOCK | ATTR_AF;
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#ifdef SMP
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l1_block_entry |= ATTR_SH(ATTR_SH_IS);
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#endif
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/* Set the physical address */
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phy_addr = l1_block_entry | (l1_table_idx << L1_SHIFT);
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/* Index of L1 pagetable. Each pagetable entry is 8 bytes */
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l1_table_entry = (vm_offset_t*)((abp->kern_l0pt + PAGE_SIZE) +
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(l1_table_idx << 3));
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*l1_table_entry = phy_addr;
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}
|
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|
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/*
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* Copy the initrd image passed using U-Boot's booti command into
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* KVA space.
|
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*/
|
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static void
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linux_load_initrd(vm_offset_t *lastaddr, struct arm64_bootparams *abp)
|
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{
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phandle_t chosen;
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uint64_t initrd_start = 0, initrd_end = 0;
|
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uint64_t initrd_size;
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caddr_t preload_ptr;
|
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size_t preload_size = 0;
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|
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if ((chosen = OF_finddevice("/chosen")) == -1)
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return;
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|
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if (!(OF_hasprop(chosen, INITRD_START) &&
|
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OF_hasprop(chosen, INITRD_END)))
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return;
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|
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if ((OF_getprop(chosen, INITRD_START, &initrd_start, sizeof(uint64_t))) > 0)
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initrd_start = fdt64_to_cpu(initrd_start);
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|
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if ((OF_getprop(chosen, INITRD_END, &initrd_end, sizeof(uint64_t))) > 0)
|
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initrd_end = fdt64_to_cpu(initrd_end);
|
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|
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if ((initrd_size = (initrd_end - initrd_start)) <= 0)
|
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return;
|
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|
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if (build_l2_block_pagetable(*lastaddr, initrd_size, abp) != 0)
|
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return;
|
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|
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build_l1_block_pagetable(initrd_start, abp);
|
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|
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/* Copy the initrd image to virtual address space */
|
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memmove((void*)(*lastaddr), (void*)initrd_start, initrd_size);
|
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|
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preload_ptr = metadata_endptr;
|
||||
|
||||
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_NAME);
|
||||
PRELOAD_PUSH_STRING("initrd");
|
||||
|
||||
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_TYPE);
|
||||
PRELOAD_PUSH_STRING("md_image");
|
||||
|
||||
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_SIZE);
|
||||
PRELOAD_PUSH_VALUE(uint32_t, sizeof(uint64_t));
|
||||
PRELOAD_PUSH_VALUE(uint64_t, initrd_size);
|
||||
|
||||
PRELOAD_PUSH_VALUE(uint32_t, MODINFO_ADDR);
|
||||
PRELOAD_PUSH_VALUE(uint32_t, sizeof(vm_offset_t));
|
||||
PRELOAD_PUSH_VALUE(uint64_t, *lastaddr);
|
||||
|
||||
*lastaddr += initrd_size;
|
||||
*lastaddr = roundup(*lastaddr, sizeof(vm_offset_t));
|
||||
|
||||
/* End marker */
|
||||
metadata_endptr = preload_ptr;
|
||||
PRELOAD_PUSH_VALUE(uint32_t, 0);
|
||||
PRELOAD_PUSH_VALUE(uint32_t, 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Parse initrd image arguments, bootargs passed in FDT from U-Boot.
|
||||
*/
|
||||
void
|
||||
parse_bootargs(vm_offset_t *lastaddr, struct arm64_bootparams *abp)
|
||||
{
|
||||
|
||||
/*
|
||||
* Fake metadata is used to support boot from U-Boot. Process bootargs,
|
||||
* initrd args from FDT blob set in fake medadata.
|
||||
*/
|
||||
if (metadata_endptr == NULL)
|
||||
return;
|
||||
|
||||
/* Booted from U-Boot */
|
||||
linux_load_initrd(lastaddr, abp);
|
||||
|
||||
/*
|
||||
* L2 PTEs map addresses in order of kernel, dtb, initrd image.
|
||||
* Add L2 pages at the end for pmap to bootstrap L2, L3 PTEs, etc.
|
||||
*/
|
||||
build_l2_block_pagetable(*lastaddr,
|
||||
(PMAP_BOOTSTRAP_PAGES * L2_SIZE) - 1, abp);
|
||||
|
||||
init_static_kenv(static_kenv, sizeof(static_kenv));
|
||||
ofw_parse_bootargs();
|
||||
}
|
||||
#endif
|
||||
@ -77,7 +77,6 @@ options RACCT_DEFAULT_TO_DISABLED # Set kern.racct.enable=0 by default
|
||||
options RCTL # Resource limits
|
||||
options SMP
|
||||
options INTRNG
|
||||
options LINUX_BOOT_ABI # Boot using booti command from U-Boot
|
||||
|
||||
# Debugging support. Always need this:
|
||||
options KDB # Enable kernel debugger support.
|
||||
|
||||
@ -48,9 +48,5 @@ extern enum arm64_bus arm64_bus_method;
|
||||
void dbg_init(void);
|
||||
void initarm(struct arm64_bootparams *);
|
||||
extern void (*pagezero)(void *);
|
||||
vm_offset_t linux_parse_boot_param(struct arm64_bootparams *);
|
||||
#ifdef LINUX_BOOT_ABI
|
||||
void parse_bootargs(vm_offset_t *, struct arm64_bootparams *);
|
||||
#endif
|
||||
|
||||
#endif /* _MACHINE_MACHDEP_H_ */
|
||||
|
||||
@ -31,18 +31,6 @@ INCLUDES+= -I$S/contrib/libfdt
|
||||
CFLAGS += -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
|
||||
.endif
|
||||
|
||||
SYSTEM_LD_ = ${LD} -Bdynamic -T ldscript.$M.noheader \
|
||||
${_LDFLAGS} --no-warn-mismatch --warn-common --export-dynamic \
|
||||
--dynamic-linker /red/herring \
|
||||
-o ${FULLKERNEL}.noheader -X ${SYSTEM_OBJS} vers.o
|
||||
|
||||
SYSTEM_LD_TAIL +=;sed s/" + SIZEOF_HEADERS"// $(LDSCRIPT)\
|
||||
>ldscript.$M.noheader;\
|
||||
${SYSTEM_LD_}; \
|
||||
${OBJCOPY} -S -O binary ${FULLKERNEL}.noheader \
|
||||
${KERNEL_KO}.bin; \
|
||||
rm ${FULLKERNEL}.noheader
|
||||
|
||||
%BEFORE_DEPEND
|
||||
|
||||
%OBJS
|
||||
|
||||
@ -154,7 +154,6 @@ arm64/arm64/identcpu.c standard
|
||||
arm64/arm64/in_cksum.c optional inet | inet6
|
||||
arm64/arm64/locore.S standard no-obj
|
||||
arm64/arm64/machdep.c standard
|
||||
arm64/arm64/machdep_boot.c optional linux_boot_abi
|
||||
arm64/arm64/mem.c standard
|
||||
arm64/arm64/memcpy.S standard
|
||||
arm64/arm64/memmove.S standard
|
||||
|
||||
@ -2,7 +2,6 @@
|
||||
|
||||
ARM64 opt_global.h
|
||||
INTRNG opt_global.h
|
||||
LINUX_BOOT_ABI opt_global.h
|
||||
SOCDEV_PA opt_global.h
|
||||
SOCDEV_VA opt_global.h
|
||||
THUNDERX_PASS_1_1_ERRATA opt_global.h
|
||||
|
||||
Loading…
Reference in New Issue
Block a user