sh: SH-4A UBC support
A simple patch to enable the UBC on SH-4A.
Signed-off-by: Ryusuke Sakato <sakato@hsdv.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 0b1d5dd..91516dc 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -5,6 +5,7 @@
* Copyright (C) 1995 Linus Torvalds
*
* SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
+ * Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC
*/
/*
@@ -290,6 +291,24 @@
static void
ubc_set_tracing(int asid, unsigned long pc)
{
+#if defined(CONFIG_CPU_SH4A)
+ unsigned long val;
+
+ val = (UBC_CBR_ID_INST | UBC_CBR_RW_READ | UBC_CBR_CE);
+ val |= (UBC_CBR_AIE | UBC_CBR_AIV_SET(asid));
+
+ ctrl_outl(val, UBC_CBR0);
+ ctrl_outl(pc, UBC_CAR0);
+ ctrl_outl(0x0, UBC_CAMR0);
+ ctrl_outl(0x0, UBC_CBCR);
+
+ val = (UBC_CRR_RES | UBC_CRR_PCB | UBC_CRR_BIE);
+ ctrl_outl(val, UBC_CRR0);
+
+ /* Read UBC register that we writed last. For chekking UBC Register changed */
+ val = ctrl_inl(UBC_CRR0);
+
+#else /* CONFIG_CPU_SH4A */
ctrl_outl(pc, UBC_BARA);
#ifdef CONFIG_MMU
@@ -307,6 +326,7 @@
ctrl_outw(BBR_INST | BBR_READ, UBC_BBRA);
ctrl_outw(BRCR_PCBA, UBC_BRCR);
}
+#endif /* CONFIG_CPU_SH4A */
}
/*
@@ -359,8 +379,13 @@
#endif
ubc_set_tracing(asid, next->thread.ubc_pc);
} else {
+#if defined(CONFIG_CPU_SH4A)
+ ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
+ ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
+#else
ctrl_outw(0, UBC_BBRA);
ctrl_outw(0, UBC_BBRB);
+#endif
}
return prev;
@@ -460,8 +485,13 @@
struct pt_regs regs)
{
/* Clear tracing. */
+#if defined(CONFIG_CPU_SH4A)
+ ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
+ ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
+#else
ctrl_outw(0, UBC_BBRA);
ctrl_outw(0, UBC_BBRB);
+#endif
current->thread.ubc_pc = 0;
ubc_usercnt -= 1;