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Add kernel free map and linear map

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This commit is contained in:
songyanguang
2024-12-06 16:25:40 +08:00
parent a268135205
commit d7c99b7f01
6 changed files with 135 additions and 17 deletions
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Ubiquitous/XiZi_AIoT/hardkernel/mmu/riscv/rv64gc/bootmmu.c
+38 -9
View File
@@ -33,14 +33,14 @@ Modification:
#include "pagetable.h"
#include "registers.h"
#include "ns16550.h"
#include "printf.h"
#include <asm/csr.h>
#include <asm/pgtable-bits.h>
#include <stdint.h>
#include <string.h>
// clang-format off
//
#define L2_PTE_VALID (1 << 0)
#define L3_PTE_VALID (1 << 0)
@@ -62,7 +62,7 @@ Modification:
#define PAGE_KERNEL_READ (_PAGE_KERNEL & ~_PAGE_WRITE)
#define PAGE_KERNEL_EXEC (_PAGE_KERNEL | _PAGE_EXEC)
// clang-format on
//
uint64_t boot_l2pgdir[NUM_LEVEL2_PDE] __attribute__((aligned(0x1000))) = { 0 };
uint64_t boot_dev_l3pgdir[NUM_LEVEL3_PDE] __attribute__((aligned(0x1000))) = { 0 };
@@ -71,7 +71,7 @@ uint64_t boot_kern_l3pgdir[NUM_LEVEL3_PDE] __attribute__((aligned(0x1000))) = {
uint64_t boot_dev_l4pgdirs[NUM_LEVEL3_PDE][NUM_LEVEL4_PTE] __attribute__((aligned(0x1000))) = { 0 };
uint64_t boot_kern_l4pgdirs[NUM_LEVEL3_PDE][NUM_LEVEL4_PTE] __attribute__((aligned(0x1000))) = { 0 };
//
static void build_boot_pgdir()
{
static bool built = false;
@@ -118,16 +118,45 @@ static void load_boot_pgdir()
csr_write(CSR_SATP, satp_val);
}
//
static int test_access_map_address(void)
{
unsigned long address = KERN_MEM_BASE + (PHY_USER_FREEMEM_BASE - PHY_MEM_BASE) - 4096;
printf_early("to access 0x%lx\n", address);
*(unsigned long *)address = 0x55;
if(*(unsigned long *)address == 0x55) {
printf_early("access 0x%lx done\n", address);
}
return 0;
}
static int test_access_unmap_address(void)
{
unsigned long address = KERN_MEM_BASE + (PHY_USER_FREEMEM_BASE - PHY_MEM_BASE) + 4096;
*(unsigned long *)address = 0x55;
printf_early("access 0x%lx done\n", address);
return 0;
}
static void test_mmu(void)
{
test_access_map_address();
test_access_unmap_address();
}
//
extern void main(void);
void bootmain(void)
{
_debug_uart_printascii("bootmain start.\n");
build_boot_pgdir();
load_boot_pgdir();
_debug_uart_printascii("boot pgdir success\n");
_debug_uart_printascii("bootmain start\n");
#if 0
test_mmu();
#endif
main();
_debug_uart_printascii("bootmain end\n");
while(1);
}