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[src/trunk]: src/sys/arch/arm/broadcom * Convert bus address to physical addr...
details: https://anonhg.NetBSD.org/src/rev/51268c96b0f4
branches: trunk
changeset: 834347:51268c96b0f4
user: rin <rin%NetBSD.org@localhost>
date: Fri Aug 10 04:44:15 2018 +0000
description:
* Convert bus address to physical address in xxx_bs_mmap(), as done in
xxx_bs_map().
* Reuse bs_map and bs_mmap in arm_generic_bs_tag in order to
- set pmap flags properly for aarch64
- dedup codes
OK ryo
diffstat:
sys/arch/arm/broadcom/bcm283x_platform.c | 150 +++++++++++-------------------
1 files changed, 54 insertions(+), 96 deletions(-)
diffs (216 lines):
diff -r c13ccc06bf01 -r 51268c96b0f4 sys/arch/arm/broadcom/bcm283x_platform.c
--- a/sys/arch/arm/broadcom/bcm283x_platform.c Fri Aug 10 04:24:46 2018 +0000
+++ b/sys/arch/arm/broadcom/bcm283x_platform.c Fri Aug 10 04:44:15 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: bcm283x_platform.c,v 1.11 2018/08/05 14:02:35 skrll Exp $ */
+/* $NetBSD: bcm283x_platform.c,v 1.12 2018/08/10 04:44:15 rin Exp $ */
/*-
* Copyright (c) 2017 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm283x_platform.c,v 1.11 2018/08/05 14:02:35 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm283x_platform.c,v 1.12 2018/08/10 04:44:15 rin Exp $");
#include "opt_arm_debug.h"
#include "opt_bcm283x.h"
@@ -134,125 +134,83 @@
struct bus_space bcm2836_bs_tag;
struct bus_space bcm2836_a4x_bs_tag;
-int bcm283x_bs_map(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *);
-paddr_t bcm283x_bs_mmap(void *, bus_addr_t, off_t, int, int);
-paddr_t bcm283x_a4x_bs_mmap(void *, bus_addr_t, off_t, int, int);
+static paddr_t bcm2835_bus_to_phys(bus_addr_t);
+static paddr_t bcm2836_bus_to_phys(bus_addr_t);
-int
-bcm283x_bs_map(void *t, bus_addr_t ba, bus_size_t size, int flag,
- bus_space_handle_t *bshp)
+static paddr_t
+bcm2835_bus_to_phys(bus_addr_t ba)
{
- u_long startpa, endpa, pa;
- vaddr_t va;
-
- /* Convert BA to PA */
- pa = ba & ~BCM2835_BUSADDR_CACHE_MASK;
-
- startpa = trunc_page(pa);
- endpa = round_page(pa + size);
-
- /* XXX use extent manager to check duplicate mapping */
- va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
- UVM_KMF_VAONLY | UVM_KMF_NOWAIT | UVM_KMF_COLORMATCH);
- if (!va)
- return ENOMEM;
-
- *bshp = (bus_space_handle_t)(va + (pa - startpa));
+ /* Attempt to find the PA device mapping */
+ if (ba >= BCM2835_PERIPHERALS_BASE_BUS &&
+ ba < BCM2835_PERIPHERALS_BASE_BUS + BCM2835_PERIPHERALS_SIZE)
+ return BCM2835_PERIPHERALS_BUS_TO_PHYS(ba);
- int pmapflags;
- if (flag & BUS_SPACE_MAP_PREFETCHABLE)
- pmapflags = PMAP_WRITE_COMBINE;
- else if (flag & BUS_SPACE_MAP_CACHEABLE)
- pmapflags = 0;
- else
- pmapflags = PMAP_NOCACHE;
- for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
- pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags);
- }
- pmap_update(pmap_kernel());
-
- return 0;
+ return ba & ~BCM2835_BUSADDR_CACHE_MASK;
}
-paddr_t
-bcm283x_bs_mmap(void *t, bus_addr_t bpa, off_t offset, int prot, int flags)
+static paddr_t
+bcm2836_bus_to_phys(bus_addr_t ba)
{
- /* Convert BA to PA */
- const paddr_t pa = bpa & ~BCM2835_BUSADDR_CACHE_MASK;
- paddr_t bus_flags = 0;
-
- if (flags & BUS_SPACE_MAP_PREFETCHABLE)
- bus_flags |= ARM_MMAP_WRITECOMBINE;
- return arm_btop(pa + offset) | bus_flags;
-}
+ /* Attempt to find the PA device mapping */
+ if (ba >= BCM2835_PERIPHERALS_BASE_BUS &&
+ ba < BCM2835_PERIPHERALS_BASE_BUS + BCM2835_PERIPHERALS_SIZE)
+ return BCM2836_PERIPHERALS_BUS_TO_PHYS(ba);
-paddr_t
-bcm283x_a4x_bs_mmap(void *t, bus_addr_t bpa, off_t offset, int prot, int flags)
-{
- /* Convert BA to PA */
- const paddr_t pa = bpa & ~BCM2835_BUSADDR_CACHE_MASK;
- paddr_t bus_flags = 0;
+ if (ba >= BCM2836_ARM_LOCAL_BASE &&
+ ba < BCM2836_ARM_LOCAL_BASE + BCM2836_ARM_LOCAL_SIZE)
+ return ba;
- if (flags & BUS_SPACE_MAP_PREFETCHABLE)
- bus_flags |= ARM_MMAP_WRITECOMBINE;
-
- return arm_btop(pa + 4 * offset) | bus_flags;
+ return ba & ~BCM2835_BUSADDR_CACHE_MASK;
}
int
bcm2835_bs_map(void *t, bus_addr_t ba, bus_size_t size, int flag,
bus_space_handle_t *bshp)
{
- const struct pmap_devmap *pd;
- bool match = false;
- u_long pa;
+ const paddr_t pa = bcm2835_bus_to_phys(ba);
+
+ return bus_space_map(&arm_generic_bs_tag, pa, size, flag, bshp);
+}
- /* Attempt to find the PA device mapping */
- if (ba >= BCM2835_PERIPHERALS_BASE_BUS &&
- ba < BCM2835_PERIPHERALS_BASE_BUS + BCM2835_PERIPHERALS_SIZE) {
- match = true;
- pa = BCM2835_PERIPHERALS_BUS_TO_PHYS(ba);
- }
+paddr_t
+bcm2835_bs_mmap(void *t, bus_addr_t ba, off_t offset, int prot, int flags)
+{
+ const paddr_t pa = bcm2835_bus_to_phys(ba);
- if (match && (pd = pmap_devmap_find_pa(pa, size)) != NULL) {
- /* Device was statically mapped. */
- *bshp = pd->pd_va + (pa - pd->pd_pa);
- return 0;
- }
+ return bus_space_mmap(&arm_generic_bs_tag, pa, offset, prot, flags);
+}
- return bcm283x_bs_map(t, ba, size, flag, bshp);
+paddr_t
+bcm2835_a4x_bs_mmap(void *t, bus_addr_t ba, off_t offset, int prot, int flags)
+{
+
+ return bcm2835_bs_mmap(t, ba, 4 * offset, prot, flags);
}
int
bcm2836_bs_map(void *t, bus_addr_t ba, bus_size_t size, int flag,
bus_space_handle_t *bshp)
{
- const struct pmap_devmap *pd;
- bool match = false;
- u_long pa;
+ const paddr_t pa = bcm2836_bus_to_phys(ba);
- /* Attempt to find the PA device mapping */
- if (ba >= BCM2835_PERIPHERALS_BASE_BUS &&
- ba < BCM2835_PERIPHERALS_BASE_BUS + BCM2835_PERIPHERALS_SIZE) {
- match = true;
- pa = BCM2836_PERIPHERALS_BUS_TO_PHYS(ba);
- }
+ return bus_space_map(&arm_generic_bs_tag, pa, size, flag, bshp);
+}
- if (ba >= BCM2836_ARM_LOCAL_BASE &&
- ba < BCM2836_ARM_LOCAL_BASE + BCM2836_ARM_LOCAL_SIZE) {
- match = true;
- pa = ba;
- }
+paddr_t
+bcm2836_bs_mmap(void *t, bus_addr_t ba, off_t offset, int prot, int flags)
+{
+ const paddr_t pa = bcm2836_bus_to_phys(ba);
- if (match && (pd = pmap_devmap_find_pa(pa, size)) != NULL) {
- /* Device was statically mapped. */
- *bshp = pd->pd_va + (pa - pd->pd_pa);
- return 0;
- }
+ return bus_space_mmap(&arm_generic_bs_tag, pa, offset, prot, flags);
+}
- return bcm283x_bs_map(t, ba, size, flag, bshp);
+paddr_t
+bcm2836_a4x_bs_mmap(void *t, bus_addr_t ba, off_t offset, int prot, int flags)
+{
+
+ return bcm2836_bs_mmap(t, ba, 4 * offset, prot, flags);
}
struct arm32_dma_range bcm2835_dma_ranges[] = {
@@ -1223,9 +1181,9 @@
bcm2835_a4x_bs_tag = arm_generic_a4x_bs_tag;
bcm2835_bs_tag.bs_map = bcm2835_bs_map;
- bcm2835_bs_tag.bs_mmap = bcm283x_bs_mmap;
+ bcm2835_bs_tag.bs_mmap = bcm2835_bs_mmap;
bcm2835_a4x_bs_tag.bs_map = bcm2835_bs_map;
- bcm2835_a4x_bs_tag.bs_mmap = bcm283x_a4x_bs_mmap;
+ bcm2835_a4x_bs_tag.bs_mmap = bcm2835_a4x_bs_mmap;
fdtbus_set_decoderegprop(false);
@@ -1244,9 +1202,9 @@
bcm2836_a4x_bs_tag = arm_generic_a4x_bs_tag;
bcm2836_bs_tag.bs_map = bcm2836_bs_map;
- bcm2836_bs_tag.bs_mmap = bcm283x_bs_mmap;
+ bcm2836_bs_tag.bs_mmap = bcm2836_bs_mmap;
bcm2836_a4x_bs_tag.bs_map = bcm2836_bs_map;
- bcm2836_a4x_bs_tag.bs_mmap = bcm283x_a4x_bs_mmap;
+ bcm2836_a4x_bs_tag.bs_mmap = bcm2836_a4x_bs_mmap;
fdtbus_set_decoderegprop(false);
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