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[src/trunk]: src/sys/arch/arm/arm32 If we are going to map all of physical me...
details: https://anonhg.NetBSD.org/src/rev/3f09eb0c4530
branches: trunk
changeset: 794010:3f09eb0c4530
user: matt <matt%NetBSD.org@localhost>
date: Mon Mar 03 14:03:14 2014 +0000
description:
If we are going to map all of physical memory, we don't need to allocate
l2 page tables for the kernel.
diffstat:
sys/arch/arm/arm32/arm32_kvminit.c | 68 +++++++++++++++++++++++++++----------
1 files changed, 50 insertions(+), 18 deletions(-)
diffs (161 lines):
diff -r af361e70bf81 -r 3f09eb0c4530 sys/arch/arm/arm32/arm32_kvminit.c
--- a/sys/arch/arm/arm32/arm32_kvminit.c Mon Mar 03 14:01:30 2014 +0000
+++ b/sys/arch/arm/arm32/arm32_kvminit.c Mon Mar 03 14:03:14 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: arm32_kvminit.c,v 1.22 2013/08/29 15:46:17 riz Exp $ */
+/* $NetBSD: arm32_kvminit.c,v 1.23 2014/03/03 14:03:14 matt Exp $ */
/*
* Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved.
@@ -122,7 +122,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: arm32_kvminit.c,v 1.22 2013/08/29 15:46:17 riz Exp $");
+__KERNEL_RCSID(0, "$NetBSD: arm32_kvminit.c,v 1.23 2014/03/03 14:03:14 matt Exp $");
#include <sys/param.h>
#include <sys/device.h>
@@ -302,6 +302,8 @@
size_t free_idx = 0;
static bool l1pt_found;
+ KASSERT(npages > 0);
+
/*
* If we haven't allocated the kernel L1 page table and we are aligned
* at a L1 table boundary, alloc the memory for it.
@@ -392,21 +394,31 @@
*/
size_t kernel_size = bmi->bmi_kernelend;
kernel_size -= (bmi->bmi_kernelstart & -L2_S_SEGSIZE);
- kernel_size += L1_TABLE_SIZE;
- kernel_size += L2_TABLE_SIZE * (2 + 1 + KERNEL_L2PT_VMDATA_NUM + 1);
+ kernel_size += L1_TABLE_SIZE_REAL;
+ kernel_size += PAGE_SIZE * KERNEL_L2PT_VMDATA_NUM;
+ if (map_vectors_p) {
+ kernel_size += PAGE_SIZE; /* L2PT for VECTORS */
+ }
+ if (iovbase) {
+ kernel_size += PAGE_SIZE; /* L2PT for IO */
+ }
kernel_size +=
cpu_num * (ABT_STACK_SIZE + FIQ_STACK_SIZE + IRQ_STACK_SIZE
+ UND_STACK_SIZE + UPAGES) * PAGE_SIZE;
kernel_size += round_page(MSGBUFSIZE);
kernel_size += 0x10000; /* slop */
- kernel_size += PAGE_SIZE * (kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE;
+ if (!mapallmem_p) {
+ kernel_size += PAGE_SIZE
+ * ((kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE);
+ }
kernel_size = round_page(kernel_size);
/*
- * Now we know how many L2 pages it will take.
+ * Now we know how many L2 pages it will take. If we've mapped
+ * all of memory, then it won't take any.
*/
- const size_t KERNEL_L2PT_KERNEL_NUM =
- (kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE;
+ const size_t KERNEL_L2PT_KERNEL_NUM = mapallmem_p
+ ? 0 : round_page(kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE;
#ifdef VERBOSE_INIT_ARM
printf("%s: %zu L2 pages are needed to map %#zx kernel bytes\n",
@@ -463,9 +475,8 @@
#ifdef VERBOSE_INIT_ARM
printf(" vector");
#endif
- valloc_pages(bmi, &bmi->bmi_vector_l2pt,
- L2_TABLE_SIZE / PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
- PTE_PAGETABLE, true);
+ valloc_pages(bmi, &bmi->bmi_vector_l2pt, 1,
+ VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true);
add_pages(bmi, &bmi->bmi_vector_l2pt);
}
@@ -475,8 +486,10 @@
#ifdef VERBOSE_INIT_ARM
printf(" kernel");
#endif
+ KASSERT(mapallmem_p || KERNEL_L2PT_KERNEL_NUM > 0);
+ KASSERT(!mapallmem_p || KERNEL_L2PT_KERNEL_NUM == 0);
for (size_t idx = 0; idx < KERNEL_L2PT_KERNEL_NUM; ++idx) {
- valloc_pages(bmi, &kernel_l2pt[idx], L2_TABLE_SIZE / PAGE_SIZE,
+ valloc_pages(bmi, &kernel_l2pt[idx], 1,
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true);
add_pages(bmi, &kernel_l2pt[idx]);
}
@@ -488,7 +501,7 @@
printf(" vm");
#endif
for (size_t idx = 0; idx < KERNEL_L2PT_VMDATA_NUM; ++idx) {
- valloc_pages(bmi, &vmdata_l2pt[idx], L2_TABLE_SIZE / PAGE_SIZE,
+ valloc_pages(bmi, &vmdata_l2pt[idx], 1,
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true);
add_pages(bmi, &vmdata_l2pt[idx]);
}
@@ -496,11 +509,11 @@
/*
* If someone wanted a L2 page for I/O, allocate it now.
*/
- if (iovbase != 0) {
+ if (iovbase) {
#ifdef VERBOSE_INIT_ARM
printf(" io");
#endif
- valloc_pages(bmi, &bmi->bmi_io_l2pt, L2_TABLE_SIZE / PAGE_SIZE,
+ valloc_pages(bmi, &bmi->bmi_io_l2pt, 1,
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true);
add_pages(bmi, &bmi->bmi_io_l2pt);
}
@@ -600,8 +613,8 @@
&kernel_l2pt[idx]);
#ifdef VERBOSE_INIT_ARM
printf("%s: adding L2 pt (VA %#lx, PA %#lx) for VA %#lx (kernel)\n",
- __func__, kernel_l2pt[idx].pv_va, kernel_l2pt[idx].pv_pa,
- kernel_base + idx * L2_S_SEGSIZE);
+ __func__, kernel_l2pt[idx].pv_va,
+ kernel_l2pt[idx].pv_pa, kernel_base + idx * L2_S_SEGSIZE);
#endif
}
@@ -903,17 +916,36 @@
printf("switching to new L1 page table @%#lx...", l1pt_pa);
#endif
+#ifdef ARM_MMU_EXTENDED
+ cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2))
+ | (DOMAIN_CLIENT << (PMAP_DOMAIN_USER*2)));
+#else
cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
+#endif
cpu_idcache_wbinv_all();
+#ifdef VERBOSE_INIT_ARM
+ printf(" ttb");
+#endif
#ifdef ARM_MMU_EXTENDED
+ /*
+ * TTBCR should have been initialized by the MD start code.
+ */
+ KASSERT(armreg_ttbcr_read() == __SHIFTIN(1, TTBCR_S_N));
cpu_setttb(l1pt_pa, KERNEL_PID);
#else
cpu_setttb(l1pt_pa, true);
+ cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
#endif
cpu_tlb_flushID();
- cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
#ifdef VERBOSE_INIT_ARM
+#ifdef ARM_MMU_EXTENDED
+ printf("TTBCR=%#x TTBR0=%#x TTBR1=%#x OK\n",
+ armreg_ttbcr_read(),
+ armreg_ttbr_read(),
+ armreg_ttbr1_read());
+#else
printf("TTBR0=%#x OK\n", armreg_ttbr_read());
#endif
+#endif
}
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