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authorKumar Gala <galak@kernel.crashing.org>2008-12-13 17:20:28 -0600
committerWolfgang Denk <wd@denx.de>2008-12-15 22:05:36 +0100
commit63240ba88cd6a220057a0f28e5bf97f5b17ac84b (patch)
tree1d4751b84ae82fe4c5dfea92765c8f4c855231e8 /lib_generic
parent65e43a10631537dcb92c302d36301a12308216c3 (diff)
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Introduce addr_map library
Add a library that helps in translating between virtual and physical addresses. This library can be useful as a simple means to implement map_physmem() and virt_to_phys() for platforms that need functionality beyond the simple 1:1 mapping. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'lib_generic')
-rw-r--r--lib_generic/Makefile1
-rw-r--r--lib_generic/addr_map.c81
2 files changed, 82 insertions, 0 deletions
diff --git a/lib_generic/Makefile b/lib_generic/Makefile
index d62c39b..3f04022 100644
--- a/lib_generic/Makefile
+++ b/lib_generic/Makefile
@@ -25,6 +25,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)libgeneric.a
+COBJS-$(CONFIG_ADDR_MAP) += addr_map.o
COBJS-y += bzlib.o
COBJS-y += bzlib_crctable.o
COBJS-y += bzlib_decompress.o
diff --git a/lib_generic/addr_map.c b/lib_generic/addr_map.c
new file mode 100644
index 0000000..ff8532c
--- /dev/null
+++ b/lib_generic/addr_map.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <addr_map.h>
+
+static struct {
+ phys_addr_t paddr;
+ phys_size_t size;
+ unsigned long vaddr;
+} address_map[CONFIG_SYS_NUM_ADDR_MAP];
+
+phys_addr_t addrmap_virt_to_phys(void * vaddr)
+{
+ int i;
+
+ for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
+ u64 base, upper, addr;
+
+ if (address_map[i].size == 0)
+ continue;
+
+ addr = (u64)((u32)vaddr);
+ base = (u64)(address_map[i].vaddr);
+ upper = (u64)(address_map[i].size) + base - 1;
+
+ if (addr >= base && addr <= upper) {
+ return addr - address_map[i].vaddr + address_map[i].paddr;
+ }
+ }
+
+ return (phys_addr_t)(~0);
+}
+
+unsigned long addrmap_phys_to_virt(phys_addr_t paddr)
+{
+ int i;
+
+ for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
+ u64 base, upper, addr;
+
+ if (address_map[i].size == 0)
+ continue;
+
+ addr = (u64)paddr;
+ base = (u64)(address_map[i].paddr);
+ upper = (u64)(address_map[i].size) + base - 1;
+
+ if (addr >= base && addr <= upper) {
+ return paddr - address_map[i].paddr + address_map[i].vaddr;
+ }
+ }
+
+ return (unsigned long)(~0);
+}
+
+void addrmap_set_entry(unsigned long vaddr, phys_addr_t paddr,
+ phys_size_t size, int idx)
+{
+ if (idx > CONFIG_SYS_NUM_ADDR_MAP)
+ return;
+
+ address_map[idx].vaddr = vaddr;
+ address_map[idx].paddr = paddr;
+ address_map[idx].size = size;
+}