[OpenBIOS] [PATCH] SPARC: Fix escc instance structure alignment

[Mark Cave-Ayland]

When binding C functions to Forth words using NODE_METHODs for the SPARC ESCC
serial driver, the C instance parameter pointer was set to be a pointer to a
phys_addr_t.

This is incorrect in the case where sizeof(phys_addr_t) != sizeof(cell) such
as on SPARC32, as the address allocated from the Forth machine would be aligned
to sizeof(cell); hence an alignment exception could be generated on random
occasions on SPARC32 when the allocated address generated by Forth when opening
the device was aligned to just 4 bytes (and not also 8 bytes) when derefencing
the instance parameter pointer.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>
---
 openbios-devel/drivers/escc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/openbios-devel/drivers/escc.c b/openbios-devel/drivers/escc.c
index 892dc8c..9973fe1 100644
--- a/openbios-devel/drivers/escc.c
+++ b/openbios-devel/drivers/escc.c
@@ -131,7 +131,7 @@ void serial_cls(void)
 
 /* ( addr len -- actual ) */
 static void
-escc_read(phys_addr_t *address)
+escc_read(ucell *address)
 {
     char *addr;
     int len;
@@ -152,7 +152,7 @@ escc_read(phys_addr_t *address)
 
 /* ( addr len -- actual ) */
 static void
-escc_write(phys_addr_t *address)
+escc_write(ucell *address)
 {
     unsigned char *addr;
     int i, len;
@@ -172,7 +172,7 @@ escc_close(void)
 }
 
 static void
-escc_open(phys_addr_t *address)
+escc_open(ucell *address)
 {
 #ifdef CONFIG_DRIVER_ESCC_SUN
     int len;
@@ -199,7 +199,7 @@ escc_open(phys_addr_t *address)
     RET ( -1 );
 }
 
-DECLARE_UNNAMED_NODE(escc, INSTALL_OPEN, sizeof(phys_addr_t));
+DECLARE_UNNAMED_NODE(escc, INSTALL_OPEN, sizeof(ucell));
 
 NODE_METHODS(escc) = {
     { "open",               escc_open              },
-- 
1.7.10.4