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authorPaul Mundt <lethal@linux-sh.org>2010-04-02 11:13:27 +0400
committerPaul Mundt <lethal@linux-sh.org>2010-04-02 11:13:27 +0400
commitbe97d758e5728099e95fe229866d5c6c900d3092 (patch)
tree5c5a3fa4b7978857562d730e3101181b5fbebb9f /arch/sh/mm/tlb-sh3.c
parent5dd6ef5050c5012267e2b84f3d82ba85cdb5ca32 (diff)
downloadlinux-be97d758e5728099e95fe229866d5c6c900d3092.tar.xz
sh: Fix up the SH-3 build for recent TLB changes.
While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4 and later TLBs, these features are absent on SH-3. This splits out local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the old SH-3 one, subsequently fixing up the build. This will probably want some further reordering and tidying in the future, but that's out of scope at present. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/tlb-sh3.c')
-rw-r--r--arch/sh/mm/tlb-sh3.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
index 4f5f7cbdd508..7a940dbfc2e9 100644
--- a/arch/sh/mm/tlb-sh3.c
+++ b/arch/sh/mm/tlb-sh3.c
@@ -77,3 +77,22 @@ void local_flush_tlb_one(unsigned long asid, unsigned long page)
for (i = 0; i < ways; i++)
__raw_writel(data, addr + (i << 8));
}
+
+void local_flush_tlb_all(void)
+{
+ unsigned long flags, status;
+
+ /*
+ * Flush all the TLB.
+ *
+ * Write to the MMU control register's bit:
+ * TF-bit for SH-3, TI-bit for SH-4.
+ * It's same position, bit #2.
+ */
+ local_irq_save(flags);
+ status = __raw_readl(MMUCR);
+ status |= 0x04;
+ __raw_writel(status, MMUCR);
+ ctrl_barrier();
+ local_irq_restore(flags);
+}