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authorKumar Gala <galak@kernel.crashing.org>2008-06-10 16:16:02 -0500
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-06-11 01:53:09 -0500
commitba04f7010958e88a8910f2a123fee53fdc72e013 (patch)
tree73d8ef2f836c87e4d91fc7333915981e8588742b
parent859a86a25c569d3665ff413d1d923394b8a961f3 (diff)
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FSL LAW: Add new interface to use the last free LAW
LAWs have the concept of priority so its useful to be able to allocate the lowest (highest number) priority. We will end up using this with the new DDR code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--drivers/misc/fsl_law.c19
-rw-r--r--include/asm-ppc/fsl_law.h1
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
index d7d6c40..48ece4f 100644
--- a/drivers/misc/fsl_law.c
+++ b/drivers/misc/fsl_law.c
@@ -70,6 +70,25 @@ int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
return idx;
}
+int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
+{
+ u32 idx;
+
+ /* we have no LAWs free */
+ if (gd->used_laws == -1)
+ return -1;
+
+ /* grab the last free law */
+ idx = __ilog2(~(gd->used_laws));
+
+ if (idx >= FSL_HW_NUM_LAWS)
+ return -1;
+
+ set_law(idx, addr, sz, id);
+
+ return idx;
+}
+
void disable_law(u8 idx)
{
volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
diff --git a/include/asm-ppc/fsl_law.h b/include/asm-ppc/fsl_law.h
index 6c445a4..227bf83 100644
--- a/include/asm-ppc/fsl_law.h
+++ b/include/asm-ppc/fsl_law.h
@@ -74,6 +74,7 @@ struct law_entry {
extern void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
extern int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
+extern int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
extern void disable_law(u8 idx);
extern void init_laws(void);
extern void print_laws(void);