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authorKonrad Eisele <konrad@gaisler.com>2009-08-17 02:13:33 +0200
committerDavid S. Miller <davem@davemloft.net>2009-08-18 03:32:11 +0200
commit75d9e34698540e96b422293e1d76ab02cc7faefb (patch)
treeaf7e037f1b3d59af4b2c53b5d7381afb82f3664e /arch/sparc
parentsparc,leon: Added support for AMBAPP bus. (diff)
downloadlinux-75d9e34698540e96b422293e1d76ab02cc7faefb.tar.xz
linux-75d9e34698540e96b422293e1d76ab02cc7faefb.zip
sparc, leon: sparc-leon specific SRMMU initialization and bootup fixes.
The sparc-leon caches are virtually tagged so a flush is needed on ctx switch. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/mm/srmmu.c53
1 files changed, 52 insertions, 1 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index ade4eb373bdd..509b1ffeba66 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -46,6 +46,7 @@
#include <asm/tsunami.h>
#include <asm/swift.h>
#include <asm/turbosparc.h>
+#include <asm/leon.h>
#include <asm/btfixup.h>
@@ -569,6 +570,9 @@ static void srmmu_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
}
+ if (sparc_cpu_model == sparc_leon)
+ leon_switch_mm();
+
if (is_hypersparc)
hyper_flush_whole_icache();
@@ -1977,6 +1981,45 @@ static void __init init_viking(void)
poke_srmmu = poke_viking;
}
+#ifdef CONFIG_SPARC_LEON
+
+void __init poke_leonsparc(void)
+{
+}
+
+void __init init_leon(void)
+{
+
+ srmmu_name = "Leon";
+
+ BTFIXUPSET_CALL(flush_cache_all, leon_flush_cache_all,
+ BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_cache_mm, leon_flush_cache_all,
+ BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_cache_page, leon_flush_pcache_all,
+ BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_cache_range, leon_flush_cache_all,
+ BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_page_for_dma, leon_flush_dcache_all,
+ BTFIXUPCALL_NORM);
+
+ BTFIXUPSET_CALL(flush_tlb_all, leon_flush_tlb_all, BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_tlb_mm, leon_flush_tlb_all, BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_tlb_page, leon_flush_tlb_all, BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(flush_tlb_range, leon_flush_tlb_all, BTFIXUPCALL_NORM);
+
+ BTFIXUPSET_CALL(__flush_page_to_ram, leon_flush_cache_all,
+ BTFIXUPCALL_NOP);
+ BTFIXUPSET_CALL(flush_sig_insns, leon_flush_cache_all, BTFIXUPCALL_NOP);
+
+ poke_srmmu = poke_leonsparc;
+
+ srmmu_cache_pagetables = 0;
+
+ leon_flush_during_switch = leon_flush_needed();
+}
+#endif
+
/* Probe for the srmmu chip version. */
static void __init get_srmmu_type(void)
{
@@ -1992,7 +2035,15 @@ static void __init get_srmmu_type(void)
psr_typ = (psr >> 28) & 0xf;
psr_vers = (psr >> 24) & 0xf;
- /* First, check for HyperSparc or Cypress. */
+ /* First, check for sparc-leon. */
+ if (sparc_cpu_model == sparc_leon) {
+ psr_typ = 0xf; /* hardcoded ids for older models/simulators */
+ psr_vers = 2;
+ init_leon();
+ return;
+ }
+
+ /* Second, check for HyperSparc or Cypress. */
if(mod_typ == 1) {
switch(mod_rev) {
case 7: