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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2010-08-12 13:52:54 +0700
committerReinhard Meyer <u-boot@emk-elektronik.de>2010-09-03 15:13:02 +0200
commit1f36f73fe70560a2bd286a7abc8530fdc93af9ae (patch)
tree23ba61ced5254af43107e7d0de5b25b566ac78bb /board
parent9cec2fc209a000655af77256a39ede7c7d441e56 (diff)
avr32: Add simple paging support
Use the MMU hardware to set up 1:1 mappings between physical and virtual addresses. This allows us to bypass the cache when accessing the flash without having to do any physical-to-virtual address mapping in the CFI driver. The virtual memory mappings are defined at compile time through a sorted array of virtual memory range objects. When a TLB miss exception happens, the exception handler does a binary search through the array until it finds a matching entry and loads it into the TLB. The u-boot image itself is covered by a fixed TLB entry which is never replaced. This makes the 'saveenv' command work again on ATNGW100 and other boards using the CFI driver, hopefully without breaking any rules. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'board')
-rw-r--r--board/atmel/atngw100/atngw100.c15
-rw-r--r--board/atmel/atstk1000/atstk1000.c15
-rw-r--r--board/earthlcd/favr-32-ezkit/favr-32-ezkit.c15
-rw-r--r--board/mimc/mimc200/mimc200.c20
-rw-r--r--board/miromico/hammerhead/hammerhead.c15
5 files changed, 80 insertions, 0 deletions
diff --git a/board/atmel/atngw100/atngw100.c b/board/atmel/atngw100/atngw100.c
index 4580f550df9..49bc03e3ec1 100644
--- a/board/atmel/atngw100/atngw100.c
+++ b/board/atmel/atngw100/atngw100.c
@@ -26,11 +26,26 @@
#include <asm/arch/clk.h>
#include <asm/arch/gpio.h>
#include <asm/arch/hmatrix.h>
+#include <asm/arch/mmu.h>
#include <asm/arch/portmux.h>
#include <netdev.h>
DECLARE_GLOBAL_DATA_PTR;
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+ {
+ .virt_pgno = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
+ .nr_pages = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SDRAM_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_WRBACK,
+ },
+};
+
static const struct sdram_config sdram_config = {
.data_bits = SDRAM_DATA_16BIT,
.row_bits = 13,
diff --git a/board/atmel/atstk1000/atstk1000.c b/board/atmel/atstk1000/atstk1000.c
index d91d5940b5e..8b1e1b57d78 100644
--- a/board/atmel/atstk1000/atstk1000.c
+++ b/board/atmel/atstk1000/atstk1000.c
@@ -25,11 +25,26 @@
#include <asm/sdram.h>
#include <asm/arch/clk.h>
#include <asm/arch/hmatrix.h>
+#include <asm/arch/mmu.h>
#include <asm/arch/portmux.h>
#include <netdev.h>
DECLARE_GLOBAL_DATA_PTR;
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+ {
+ .virt_pgno = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
+ .nr_pages = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SDRAM_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_WRBACK,
+ },
+};
+
static const struct sdram_config sdram_config = {
#if defined(CONFIG_ATSTK1006)
/* Dual MT48LC16M16A2-7E (64 MB) on daughterboard */
diff --git a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
index d2843c9d2b8..b0eca939b7f 100644
--- a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
+++ b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c
@@ -24,10 +24,25 @@
#include <asm/sdram.h>
#include <asm/arch/clk.h>
#include <asm/arch/hmatrix.h>
+#include <asm/arch/mmu.h>
#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+ {
+ .virt_pgno = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
+ .nr_pages = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SDRAM_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_WRBACK,
+ },
+};
+
static const struct sdram_config sdram_config = {
/* MT48LC4M32B2P-6 (16 MB) */
.data_bits = SDRAM_DATA_32BIT,
diff --git a/board/mimc/mimc200/mimc200.c b/board/mimc/mimc200/mimc200.c
index 994066943d1..470adba7948 100644
--- a/board/mimc/mimc200/mimc200.c
+++ b/board/mimc/mimc200/mimc200.c
@@ -27,12 +27,32 @@
#include <asm/arch/clk.h>
#include <asm/arch/gpio.h>
#include <asm/arch/hmatrix.h>
+#include <asm/arch/mmu.h>
#include <asm/arch/portmux.h>
#include <atmel_lcdc.h>
#include <lcd.h>
#include "../../../arch/avr32/cpu/hsmc3.h"
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+ {
+ .virt_pgno = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
+ .nr_pages = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = EBI_SRAM_CS2_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SRAM_CS2_SIZE >> PAGE_SHIFT,
+ .phys = (EBI_SRAM_CS2_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SDRAM_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_WRBACK,
+ },
+};
+
#if defined(CONFIG_LCD)
/* 480x272x16 @ 72 Hz */
vidinfo_t panel_info = {
diff --git a/board/miromico/hammerhead/hammerhead.c b/board/miromico/hammerhead/hammerhead.c
index 5ab999e4693..78f4fd405ea 100644
--- a/board/miromico/hammerhead/hammerhead.c
+++ b/board/miromico/hammerhead/hammerhead.c
@@ -30,10 +30,25 @@
#include <asm/arch/clk.h>
#include <asm/arch/hmatrix.h>
#include <asm/arch/memory-map.h>
+#include <asm/arch/mmu.h>
#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
+struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
+ {
+ .virt_pgno = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
+ .nr_pages = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_NONE,
+ }, {
+ .virt_pgno = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
+ .nr_pages = EBI_SDRAM_SIZE >> PAGE_SHIFT,
+ .phys = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
+ | MMU_VMR_CACHE_WRBACK,
+ },
+};
+
static const struct sdram_config sdram_config = {
.data_bits = SDRAM_DATA_32BIT,
.row_bits = 13,