/*
* Copyright (c) 2012-2013 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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*/
#include <mach_kdp.h>
#include <mach/vm_param.h>
#include <arm64/lowglobals.h>
#include <vm/vm_object_xnu.h>
#include <vm/vm_page.h>
/*
* On arm64, the low globals get mapped low via machine_init() during kernel
* bootstrap.
*/
extern vm_offset_t vm_kernel_stext;
extern void *version;
extern void *kmod;
extern void *kdp_trans_off;
extern void *osversion;
extern void *flag_kdp_trigger_reboot;
extern void *manual_pkt;
extern struct vm_object pmap_object_store; /* store pt pages */
extern vm_offset_t c_buffers;
extern vm_size_t c_buffers_size;
lowglo lowGlo __attribute__ ((aligned(PAGE_MAX_SIZE))) = {
// Increment the major version for changes that break the current Astris
// usage of lowGlo values
// Increment the minor version for changes that provide additonal info/function
// but does not break current usage
.lgLayoutMajorVersion = 3,
.lgLayoutMinorVersion = 3,
.lgLayoutMagic = LOWGLO_LAYOUT_MAGIC,
.lgVerCode = { 'K', 'r', 'a', 'k', 'e', 'n', ' ', ' ' },
.lgZero = 0,
.lgStext = 0, // To be filled in below
.lgVersion = (uint64_t) &version,
.lgOSVersion = (uint64_t) &osversion,
.lgKmodptr = (uint64_t) &kmod,
#if MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING
.lgTransOff = (uint64_t) &kdp_trans_off,
.lgRebootFlag = (uint64_t) &flag_kdp_trigger_reboot,
.lgManualPktAddr = (uint64_t) &manual_pkt,
#endif
.lgPmapMemQ = (uint64_t)&(pmap_object_store.memq),
.lgPmapMemPageOffset = offsetof(struct vm_page_with_ppnum, vmp_phys_page),
.lgPmapMemChainOffset = offsetof(struct vm_page, vmp_listq),
.lgPmapMemPagesize = (uint64_t)sizeof(struct vm_page),
.lgPmapMemFromArrayMask = VM_PAGE_PACKED_FROM_ARRAY,
.lgPmapMemPackedShift = VM_PAGE_PACKED_PTR_SHIFT,
.lgPmapMemPackedBaseAddr = VM_PAGE_PACKED_PTR_BASE,
.lgPmapMemStartAddr = -1,
.lgPmapMemEndAddr = -1,
.lgPmapMemFirstppnum = -1,
.lgPageShift = ARM_PGSHIFT,
.lgVmFirstPhys = -1,
.lgVmLastPhys = -1,
.lgPhysMapBase = -1,
.lgPhysMapEnd = -1,
.lgPmapIoRangePtr = -1,
.lgNumPmapIoRanges = -1,
.lgCompressorBufferAddr = (uint64_t) &c_buffers, // added in 3.3
.lgCompressorSizeAddr = (uint64_t) &c_buffers_size // added in 3.3
};
void
patch_low_glo(void)
{
lowGlo.lgStext = (uint64_t)vm_kernel_stext;
}
void
patch_low_glo_static_region(uint64_t address, uint64_t size)
{
lowGlo.lgStaticAddr = address;
lowGlo.lgStaticSize = size;
/**
* These values are set in pmap_bootstrap() and represent the range of
* kernel managed memory.
*/
extern const pmap_paddr_t vm_first_phys;
extern const pmap_paddr_t vm_last_phys;
assertf((vm_first_phys != 0) && (vm_last_phys != 0),
"Tried setting the Low Globals before pmap_bootstrap()");
lowGlo.lgVmFirstPhys = vm_first_phys;
lowGlo.lgVmLastPhys = vm_last_phys;
/**
* These values are set in pmap_bootstrap() and represent an array of all
* kernel-managed I/O regions (pmap-io-ranges in the device tree). Some of
* these regions may include DRAM carved out for usage by other agents on
* the system.
*
* Need to forward-declare pmap_io_range_t since that only exists in the
* PMAP code.
*/
typedef struct pmap_io_range pmap_io_range_t;
extern const pmap_io_range_t* io_attr_table;
extern const unsigned int num_io_rgns;
lowGlo.lgPmapIoRangePtr = (uint64_t)io_attr_table;
lowGlo.lgNumPmapIoRanges = (uint64_t)num_io_rgns;
/**
* These values are set in arm_vm_init() and represent the virtual address
* space used by the physical aperture.
*/
extern const vm_map_address_t physmap_base;
extern const vm_map_address_t physmap_end;
assertf((physmap_base != 0) && (physmap_end != 0),
"Tried setting the Low Globals before arm_vm_init()");
lowGlo.lgPhysMapBase = physmap_base;
lowGlo.lgPhysMapEnd = physmap_end;
}
void
patch_low_glo_vm_page_info(void * start_addr, void * end_addr, uint32_t first_ppnum)
{
lowGlo.lgPmapMemStartAddr = (uint64_t)start_addr;
lowGlo.lgPmapMemEndAddr = (uint64_t)end_addr;
lowGlo.lgPmapMemFirstppnum = first_ppnum;
lowGlo.lgPageShift = PAGE_SHIFT;
}