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Support directmapped systems with >1GB that start memory at 0x80000000.

This commit is contained in:
matt 2015-05-30 23:59:33 +00:00
parent 3c80ab26d6
commit 6ede22fafe
3 changed files with 23 additions and 8 deletions
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21
sys/arch/arm/arm32/arm32_kvminit.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: arm32_kvminit.c,v 1.33 2015/05/04 00:44:12 matt Exp $ */
/* $NetBSD: arm32_kvminit.c,v 1.34 2015/05/30 23:59:33 matt Exp $ */
/*
* Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved.
@ -124,7 +124,7 @@
#include "opt_multiprocessor.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: arm32_kvminit.c,v 1.33 2015/05/04 00:44:12 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: arm32_kvminit.c,v 1.34 2015/05/30 23:59:33 matt Exp $");
#include <sys/param.h>
#include <sys/device.h>
@ -195,6 +195,7 @@ arm32_bootmem_init(paddr_t memstart, psize_t memsize, vsize_t kernelstart)
if (physical_end == 0) {
physical_end = -PAGE_SIZE;
memsize -= PAGE_SIZE;
bmi->bmi_end -= PAGE_SIZE;
#ifdef VERBOSE_INIT_ARM
printf("%s: memsize shrunk by a page to avoid ending at 4GB\n",
__func__);
@ -441,8 +442,10 @@ arm32_kernel_vm_init(vaddr_t kernel_vm_base, vaddr_t vectors, vaddr_t iovbase,
* from TTBR0 to map some of the physical memory. But try to use as
* much high memory space as possible.
*/
if (kernel_vm_base - KERNEL_BASE < physical_size) {
pmap_directbase = kernel_vm_base - physical_size;
pmap_directlimit = kernel_vm_base;
if (kernel_vm_base - KERNEL_BASE < physical_size
&& kernel_vm_base - physical_size >= physical_start) {
pmap_directbase -= KERNEL_BASE_VOFFSET;
printf("%s: changing pmap_directbase to %#lx\n", __func__,
pmap_directbase);
}
@ -838,6 +841,9 @@ arm32_kernel_vm_init(vaddr_t kernel_vm_base, vaddr_t vectors, vaddr_t iovbase,
&& cur_pv.pv_cache == PTE_CACHE) {
cur_pv.pv_size = bmi->bmi_end - cur_pv.pv_pa;
} else {
KASSERTMSG(cur_pv.pv_va + cur_pv.pv_size <= kernel_vm_base,
"%#lx >= %#lx", cur_pv.pv_va + cur_pv.pv_size,
kernel_vm_base);
#ifdef VERBOSE_INIT_ARM
printf("%s: mapping chunk VA %#lx..%#lx "
"(PA %#lx, prot %d, cache %d)\n",
@ -854,6 +860,13 @@ arm32_kernel_vm_init(vaddr_t kernel_vm_base, vaddr_t vectors, vaddr_t iovbase,
}
}
// The amount we can direct is limited by the start of the
// virtual part of the kernel address space. Don't overrun
// into it.
if (mapallmem_p && cur_pv.pv_va + cur_pv.pv_size > kernel_vm_base) {
cur_pv.pv_size = kernel_vm_base - cur_pv.pv_va;
}
/*
* Now we map the final chunk.
*/

7
sys/arch/arm/arm32/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.322 2015/05/13 15:33:47 skrll Exp $ */
/* $NetBSD: pmap.c,v 1.323 2015/05/30 23:59:33 matt Exp $ */
/*
* Copyright 2003 Wasabi Systems, Inc.
@ -216,7 +216,7 @@
#include <arm/locore.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.322 2015/05/13 15:33:47 skrll Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.323 2015/05/30 23:59:33 matt Exp $");
//#define PMAP_DEBUG
#ifdef PMAP_DEBUG
@ -517,6 +517,7 @@ bool pmap_initialized;
* Start of direct-mapped memory
*/
vaddr_t pmap_directbase = KERNEL_BASE;
vaddr_t pmap_directlimit;
#endif
/*
@ -7859,7 +7860,7 @@ pmap_direct_mapped_phys(paddr_t pa, bool *ok_p, vaddr_t va)
if (physical_start <= pa && pa < physical_end) {
#ifdef ARM_MMU_EXTENDED
const vaddr_t newva = pmap_directbase + pa - physical_start;
if (newva >= KERNEL_BASE) {
if (newva >= KERNEL_BASE && newva < pmap_directlimit) {
va = newva;
ok = true;
}

3
sys/arch/arm/include/arm32/pmap.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.h,v 1.139 2015/05/12 07:07:16 skrll Exp $ */
/* $NetBSD: pmap.h,v 1.140 2015/05/30 23:59:33 matt Exp $ */
/*
* Copyright (c) 2002, 2003 Wasabi Systems, Inc.
@ -431,6 +431,7 @@ extern vaddr_t pmap_curmaxkvaddr;
* Starting VA of direct mapped memory (usually KERNEL_BASE).
*/
extern vaddr_t pmap_directbase;
extern vaddr_t pmap_directlimit;
#endif
/*