diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2009-11-22 20:08:27 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2009-11-22 20:22:06 +0100 |
| commit | 493ea92815e8180fcf396ee95a0552112e8b0472 (patch) | |
| tree | 2dd436191404367f6c13fe14e51c13078933d618 /i386 | |
| parent | fe1cd7b8e6b5cc7f090debf7c251820fba86ccad (diff) | |
Do not assume that VM_MIN_KERNEL_ADDRESS is 0
* i386/i386/vm_param.h (VM_MAX_KERNEL_ADDRESS): Add
VM_MIN_KERNEL_ADDRESS.
(kvtolin): Subtract VM_MIN_KERNEL_ADDRESS.
(lintokv): Add VM_MIN_KERNEL_ADDRESS.
* i386/i386at/model_dep.c (mem_size_init): Subtract
VM_MIN_KERNEL_ADDRESS in computation of phys_last_addr.
(i386at_init): Use VM_MIN_KERNEL_ADDRESS instead of 0 as
argument of lin2pdenum.
Diffstat (limited to 'i386')
| -rw-r--r-- | i386/i386/vm_param.h | 6 | ||||
| -rw-r--r-- | i386/i386at/model_dep.c | 12 |
2 files changed, 9 insertions, 9 deletions
diff --git a/i386/i386/vm_param.h b/i386/i386/vm_param.h index ba8e584..1b79dda 100644 --- a/i386/i386/vm_param.h +++ b/i386/i386/vm_param.h @@ -28,7 +28,7 @@ /* The kernel address space is 1GB, starting at virtual address 0. */ #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00000000) -#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) (LINEAR_MAX_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS)) +#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) (LINEAR_MAX_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS)) /* The kernel virtual address space is actually located at high linear addresses. @@ -58,7 +58,7 @@ extern vm_offset_t phys_mem_va; /* * Kernel virtual memory is actually at 0xc0000000 in linear addresses. */ -#define kvtolin(a) ((vm_offset_t)(a) + LINEAR_MIN_KERNEL_ADDRESS) -#define lintokv(a) ((vm_offset_t)(a) - LINEAR_MIN_KERNEL_ADDRESS) +#define kvtolin(a) ((vm_offset_t)(a) - VM_MIN_KERNEL_ADDRESS + LINEAR_MIN_KERNEL_ADDRESS) +#define lintokv(a) ((vm_offset_t)(a) - LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS) #endif /* _I386_KERNEL_I386_VM_PARAM_ */ diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 3929293..7dfeb1c 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -236,8 +236,8 @@ mem_size_init(void) /* Reserve 1/6 of the memory address space for virtual mappings. * Yes, this loses memory. Blame i386. */ - if (phys_last_addr > (VM_MAX_KERNEL_ADDRESS / 6) * 5) { - phys_last_addr = (VM_MAX_KERNEL_ADDRESS / 6) * 5; + if (phys_last_addr > ((VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 6) * 5) { + phys_last_addr = ((VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 6) * 5; printf("Truncating memory size to %dMiB\n", (phys_last_addr - phys_first_addr) / (1024 * 1024)); } @@ -321,10 +321,10 @@ i386at_init(void) * Also, set the WP bit so that on 486 or better processors * page-level write protection works in kernel mode. */ - kernel_page_dir[lin2pdenum(0)] = + kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS)] = kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS)]; #if PAE - kernel_page_dir[lin2pdenum(0) + 1] = + kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS) + 1] = kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS) + 1]; set_cr3((unsigned)kernel_pmap->pdpbase); if (!CPU_HAS_FEATURE(CPU_FEATURE_PAE)) @@ -348,9 +348,9 @@ i386at_init(void) ktss_init(); /* Get rid of the temporary direct mapping and flush it out of the TLB. */ - kernel_page_dir[lin2pdenum(0)] = 0; + kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS)] = 0; #if PAE - kernel_page_dir[lin2pdenum(0) + 1] = 0; + kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS) + 1] = 0; #endif /* PAE */ flush_tlb(); |