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[arch][arm64] add support for 16k pages

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This commit is contained in:
Travis Geiselbrecht
2025-08-31 20:54:56 -07:00
parent cc9c3a053c
commit fff0f2a740
8 changed files with 180 additions and 148 deletions
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1
arch/arm64/arch.c
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@@ -18,6 +18,7 @@
#include <lk/main.h>
#include <platform.h>
#include <lk/trace.h>
#include <assert.h>
#define LOCAL_TRACE 0

9
arch/arm64/include/arch/arm64/mmu.h
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@@ -20,6 +20,7 @@
#define NBITS32(n) IFTE((n) >> 16, 16 + NBITS16((n) >> 16), NBITS16(n))
#define NBITS(n) IFTE((n) >> 32, 32 + NBITS32((n) >> 32), NBITS32(n))
// TODO: perhaps pass KERNEL_SIZE_SHIFT in from rules.mk and compute the size from that
#ifndef MMU_KERNEL_SIZE_SHIFT
#define KERNEL_ASPACE_BITS (NBITS(0xffffffffffffffff - KERNEL_ASPACE_BASE))
#define KERNEL_BASE_BITS (NBITS(0xffffffffffffffff - KERNEL_BASE))
@@ -35,7 +36,7 @@
#endif
#ifndef MMU_USER_SIZE_SHIFT
#define MMU_USER_SIZE_SHIFT 48
#define MMU_USER_SIZE_SHIFT MMU_KERNEL_SIZE_SHIFT
#endif
#define MMU_KERNEL_PAGE_SIZE_SHIFT (PAGE_SIZE_SHIFT)
@@ -122,7 +123,6 @@
#define MMU_MAIR_ATTR(index, attr) BM(index * 8, 8, (attr))
/* L0/L1/L2/L3 descriptor types */
#define MMU_PTE_DESCRIPTOR_INVALID BM(0, 2, 0)
#define MMU_PTE_DESCRIPTOR_MASK BM(0, 2, 3)
@@ -245,10 +245,9 @@
#ifndef ASSEMBLY
#include <sys/types.h>
#include <assert.h>
#include <lk/compiler.h>
#include <arch/arm64.h>
#include <lk/compiler.h>
#include <sys/types.h>
typedef uint64_t pte_t;

41
arch/arm64/rules.mk
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@@ -18,14 +18,8 @@ MODULE_SRCS += \
$(LOCAL_DIR)/start.S \
$(LOCAL_DIR)/cache-ops.S \
# $(LOCAL_DIR)/arm/start.S \
$(LOCAL_DIR)/arm/cache.c \
$(LOCAL_DIR)/arm/ops.S \
$(LOCAL_DIR)/arm/faults.c \
$(LOCAL_DIR)/arm/dcc.S
# if its requested we build with SMP, arm generically supports 4 cpus
ifeq ($(WITH_SMP),1)
# if its requested we build with SMP, default to 4 cpus
ifeq (true,$(call TOBOOL,$(WITH_SMP)))
SMP_MAX_CPUS ?= 4
SMP_CPU_CLUSTER_SHIFT ?= 8
SMP_CPU_ID_BITS ?= 24 # Ignore aff3 bits for now since they are not next to aff2
@@ -48,15 +42,32 @@ ARCH_OPTFLAGS := -O2
# we have a mmu and want the vmm/pmm
WITH_KERNEL_VM ?= 1
ifeq ($(WITH_KERNEL_VM),1)
ifeq (true,$(call TOBOOL,$(WITH_KERNEL_VM)))
MODULE_SRCS += \
$(LOCAL_DIR)/mmu.c
ARM64_PAGE_SIZE ?= 4096
# platform/target/project is allowed to override the page size the kernel
# and user space will run at.
ifeq ($(ARM64_PAGE_SIZE), 4096)
KERNEL_ASPACE_BASE ?= 0xffff000000000000
KERNEL_ASPACE_SIZE ?= 0x0001000000000000
USER_ASPACE_BASE ?= 0x0000000001000000
USER_ASPACE_SIZE ?= 0x0000fffffe000000
else ifeq ($(ARM64_PAGE_SIZE), 16384)
GLOBAL_DEFINES += ARM64_LARGE_PAGESIZE_16K=1
KERNEL_ASPACE_BASE ?= 0xffff800000000000
KERNEL_ASPACE_SIZE ?= 0x0000800000000000
USER_ASPACE_BASE ?= 0x0000000001000000
USER_ASPACE_SIZE ?= 0x00007ffffe000000
else ifeq ($(ARM64_PAGE_SIZE), 65536)
GLOBAL_DEFINES += ARM64_LARGE_PAGESIZE_64K=1
$(error fix for 64k)
else
$(error unsupported ARM64_PAGE_SIZE)
endif
GLOBAL_DEFINES += \
KERNEL_ASPACE_BASE=$(KERNEL_ASPACE_BASE) \
@@ -68,17 +79,17 @@ GLOBAL_DEFINES += \
KERNEL_BASE ?= $(KERNEL_ASPACE_BASE)
KERNEL_LOAD_OFFSET ?= 0
GLOBAL_DEFINES += \
KERNEL_BASE=$(KERNEL_BASE) \
KERNEL_LOAD_OFFSET=$(KERNEL_LOAD_OFFSET)
else
else # !WITH_KERNEL_VM
KERNEL_BASE ?= $(MEMBASE)
KERNEL_LOAD_OFFSET ?= 0
endif
GLOBAL_DEFINES += \
KERNEL_BASE=$(KERNEL_BASE) \
KERNEL_LOAD_OFFSET=$(KERNEL_LOAD_OFFSET)
GLOBAL_DEFINES += \
MEMBASE=$(MEMBASE) \
MEMSIZE=$(MEMSIZE)
@@ -92,7 +103,7 @@ ARCH_COMPILEFLAGS += -fno-omit-frame-pointer
ARCH_COMPILEFLAGS_NOFLOAT := -mgeneral-regs-only
ARCH_COMPILEFLAGS_FLOAT :=
ARCH_LDFLAGS += -z max-page-size=4096
ARCH_LDFLAGS += -z max-page-size=$(ARM64_PAGE_SIZE)
LIBGCC := $(shell $(TOOLCHAIN_PREFIX)gcc $(GLOBAL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) -print-libgcc-file-name)

8
arch/arm64/system-onesegment.ld
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@@ -51,7 +51,7 @@ SECTIONS
__code_end = .;
}
.rodata : ALIGN(4096) {
.rodata : ALIGN(CONSTANT(MAXPAGESIZE)) {
__rodata_start = .;
__fault_handler_table_start = .;
KEEP(*(.rodata.fault_handler_table))
@@ -68,7 +68,7 @@ SECTIONS
__rodata_end = .;
}
.data : ALIGN(4096) {
.data : ALIGN(CONSTANT(MAXPAGESIZE)) {
/* writable data */
__data_start_rom = .;
/* in one segment binaries, the rom data address is on top of the ram data address */
@@ -99,7 +99,7 @@ SECTIONS
}
/* unintialized data (in same segment as writable data) */
.bss : ALIGN(4096) {
.bss : ALIGN(CONSTANT(MAXPAGESIZE)) {
__bss_start = .;
KEEP(*(.bss.prebss.*))
. = ALIGN(8);
@@ -112,7 +112,7 @@ SECTIONS
}
/* Align the end to ensure anything after the kernel ends up on its own pages */
. = ALIGN(4096);
. = ALIGN(CONSTANT(MAXPAGESIZE));
_end = .;
. = %KERNEL_BASE% + %MEMSIZE%;

1
lib/uefi/io_stack.cpp
View File

@@ -18,6 +18,7 @@
#include "io_stack.h"
#include <kernel/vm.h>
#include <stdio.h>
void *get_io_stack() {
static void *io_stack = nullptr;

12
project/qemu-virt-arm64-16k-test.mk Normal file
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@@ -0,0 +1,12 @@
# main project for qemu-aarch64
MODULES += \
app/shell \
lib/uefi \
ARM64_PAGE_SIZE := 16384
include project/virtual/test.mk
include project/virtual/fs.mk
include project/virtual/minip.mk
include project/target/qemu-virt-arm64.mk

14
scripts/do-qemuarm
View File

@@ -22,8 +22,10 @@ esac
function HELP {
echo "help:"
echo "-p <project> : specify the project to build (default qemu-virt-arm32-test, qemu-virt-arm64-test or lm3s6965evb-test)"
echo "-6 : 64bit arm"
echo "-3 : cortex-m3 based platform"
echo "-P <page size> : set the page size (default: 4K)"
echo "-v : boot kernel at EL2"
echo "-k : use KVM or HVF acceleration if present (only on 64bit)"
echo "-m <memory in MB>"
@@ -46,7 +48,7 @@ function HELP {
DO_NET=0
DO_NET_TAP=0
DO_DISK=0
DO_DISK_IMAGE=""
DISK_IMAGE=""
DO_64BIT=0
DO_VIRT=0
DO_CORTEX_M3=0
@@ -56,12 +58,13 @@ DO_CMPCTMALLOC=0
DO_MINIHEAP=0
DO_V9P=0
DO_V9P_DIR=""
PAGE_SIZE=4096
SMP=1
MEMSIZE=512
SUDO=""
PROJECT=""
while getopts cd:ghkm:Mnt36vp:s:f: FLAG; do
while getopts cd:ghkm:Mnt36vp:P:s:f: FLAG; do
case $FLAG in
c) DO_CMPCTMALLOC=1;;
d) DO_DISK=1; DISK_IMAGE=$OPTARG;;
@@ -77,6 +80,7 @@ while getopts cd:ghkm:Mnt36vp:s:f: FLAG; do
m) MEMSIZE=$OPTARG;;
s) SMP=$OPTARG;;
p) PROJECT=$OPTARG;;
P) PAGE_SIZE=$OPTARG;;
h) HELP;;
\?)
echo unrecognized option
@@ -89,7 +93,7 @@ shift $((OPTIND-1))
# pick the appropriate qemu and project
if [ $DO_64BIT == 1 ]; then
QEMU="qemu-system-aarch64"
CPU="cortex-a53"
CPU="cortex-a76"
MACHINE="virt"
if [ $DO_KVM == 1 ]; then
CPU="host"
@@ -101,7 +105,11 @@ if [ $DO_64BIT == 1 ]; then
elif [ $DO_VIRT == 1 ]; then
MACHINE+=",virtualization=on"
fi
if [ $PAGE_SIZE == 16384 ]; then
_PROJECT="qemu-virt-arm64-16k-test"
else
_PROJECT="qemu-virt-arm64-test"
fi
elif [ $DO_CORTEX_M3 == 1 ]; then
QEMU="qemu-system-arm"
CPU="cortex-m3"