[PATCH] m32r: Support M32104UT target platform

This patch is for supporting a new target platform, Renesas M32104UT
evaluation board.

The M32104UT is an eval board based on an uT-Engine specification.  This board
has an MMU-less M32R family processor, M32104.
http://www-wa0.personal-media.co.jp/pmc/archive/te/te_m32104_e.pdf

This board is one of the most popular M32R platform, so we have ported
Linux/M32R to it.

Signed-off-by: Naoto Sugai <Sugai.Naoto@ak.MitsubishiElectric.co.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S
index f6d4a5821a2c..3871b65f0c82 100644
--- a/arch/m32r/kernel/entry.S
+++ b/arch/m32r/kernel/entry.S
@@ -315,7 +315,7 @@ ENTRY(ei_handler)
         mv      r1, sp                  ; arg1(regs)
 #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2) \
         || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
-        || defined(CONFIG_CHIP_OPSP)
+        || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
 
 ;    GET_ICU_STATUS;
         seth    r0, #shigh(M32R_ICU_ISTS_ADDR)
@@ -541,7 +541,20 @@ check_int2:
         bra     check_end
         .fillinsn
 check_end:
-#endif  /* CONFIG_PLAT_OPSPUT */
+#elif defined(CONFIG_PLAT_M32104UT)
+        add3    r2, r0, #-(M32R_IRQ_INT1)       ; INT1# interrupt
+        bnez    r2, check_end
+        ; read ICU status register of PLD
+        seth    r0, #high(PLD_ICUISTS)
+        or3     r0, r0, #low(PLD_ICUISTS)
+        lduh    r0, @r0
+        slli    r0, #21
+        srli    r0, #27                         ; ISN
+        addi    r0, #(M32104UT_PLD_IRQ_BASE)
+        bra     check_end
+        .fillinsn
+check_end:
+#endif  /* CONFIG_PLAT_M32104UT */
         bl      do_IRQ
 #endif  /* CONFIG_SMP */
         ld      r14, @sp+