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Fix upper area limit

This commit is contained in:
Mathieu Maret 2021-10-28 00:58:24 +02:00
parent 07d173a9c1
commit e658ea6e48
4 changed files with 16 additions and 16 deletions
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14
arch/x86/paging.c
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@ -25,20 +25,6 @@
#define PD_SHIFT 22
#define PD_MIRROR_PAGE_IDX 1023U
/** Frontier between kernel and user space virtual addresses */
#define PAGING_BASE_USER_ADDRESS (0x40000000) /* 1GB (must be 4MB-aligned) */
#define PAGING_TOP_USER_ADDRESS (0xFFFFFFFF) /* 4GB - 1B */
#define PAGING_USER_SPACE_SIZE (0xc0000000) /* 3GB */
/** Length of the space reserved for the mirroring in the kernel
virtual space */
#define PAGING_MIRROR_SIZE (PAGE_SIZE << 10) /* 1 PD = 1024 Page Tables = 4MB */
/** Virtual address where the mirroring takes place */
#define PAGING_MIRROR_VADDR \
(PAGING_BASE_USER_ADDRESS - PAGING_MIRROR_SIZE)
static unsigned long mappedPage = 0;
struct pde {

13
arch/x86/paging.h
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@ -1,6 +1,19 @@
#pragma once
#include "types.h"
/** Frontier between kernel and user space virtual addresses */
#define PAGING_BASE_USER_ADDRESS (0x40000000) /* 1GB (must be 4MB-aligned) */
#define PAGING_TOP_USER_ADDRESS (0xFFFFFFFF) /* 4GB - 1B */
#define PAGING_USER_SPACE_SIZE (0xc0000000) /* 3GB */
/** Length of the space reserved for the mirroring in the kernel
virtual space */
#define PAGING_MIRROR_SIZE (PAGE_SIZE << 10) /* 1 PD = 1024 Page Tables = 4MB */
/** Virtual address where the mirroring takes place */
#define PAGING_MIRROR_VADDR \
(PAGING_BASE_USER_ADDRESS - PAGING_MIRROR_SIZE)
#define PAGING_MEM_USER (1U << 0)
#define PAGING_MEM_READ (1U << 1)
#define PAGING_MEM_WRITE (1U << 2)

4
core/allocArea.c
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@ -33,8 +33,8 @@ void areaInit(vaddr_t firstMemUsed, vaddr_t lastUsed, vaddr_t stackBottom, vaddr
int nbPagesStack = DIV_ROUND_UP((stackTop - stackBottom), PAGE_SIZE);
areaAdd(ALIGN_DOWN(stackBottom, PAGE_SIZE), nbPagesStack, FALSE);
}
//TODO: fix the 300
areaAdd(ALIGN_DOWN(areaAddr + PAGE_SIZE, PAGE_SIZE), 300 , TRUE);
int nbFreePages = DIV_ROUND_UP((AREA_MEM_TOP - areaAddr), PAGE_SIZE);
areaAdd(ALIGN_DOWN(areaAddr + PAGE_SIZE, PAGE_SIZE), nbFreePages , TRUE);
allocPopulate();
}

1
core/allocArea.h
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@ -6,6 +6,7 @@
// areaAlloc map vmem to phy pages
#define AREA_PHY_MAP (1<<0)
#define AREA_MEM_TOP PAGING_MIRROR_VADDR
struct memArea {
vaddr_t startAddr;