From: leigh@solinno.co.uk (Leigh Brown)
To: paulus@samba.org
Cc: trini@kernel.crashing.org, linuxppc-dev@lists.linuxppc.org,
barbieri@gmail.com
Subject: [7/9] Support for old IBM PReP boxes
Date: Thu, 29 Jul 2004 22:34:48 +0100 [thread overview]
Message-ID: <20040729213448.GA5914@george.solinno.co.uk> (raw)
Some older E20/E30 machines have a very old implementation of the
OpenPIC which trips up the existing ibm_prep_init() function. This
adds support for it. It also changes the OPENPIC_VEC_SPURIOUS
constant to work around the buggy OpenPIC in those machines.
diff -urNX .diffex linux-2.6.6-prev/arch/ppc/platforms/prep_pci.c linux-2.6.6/arch/ppc/platforms/prep_pci.c
--- linux-2.6.6-prev/arch/ppc/platforms/prep_pci.c 2004-06-09 13:58:50.000000000 +0100
+++ linux-2.6.6/arch/ppc/platforms/prep_pci.c 2004-06-09 13:59:05.000000000 +0100
@@ -837,7 +837,7 @@
ibm_prep_init(void)
{
if (have_residual_data()) {
- u32 addr, real_addr, len;
+ u32 addr, real_addr, len, offset;
PPC_DEVICE *mpic;
PnP_TAG_PACKET *pkt;
@@ -859,15 +859,22 @@
return;
#define p pkt->L4_Pack.L4_Data.L4_PPCPack
- if (!((p.PPCData[0] == 2) && (p.PPCData[1] == 32)))
- return; /* not a 32-bit memory address */
+ if (p.PPCData[1] == 32) {
+ switch (p.PPCData[0]) {
+ case 1: offset = PREP_ISA_IO_BASE; break;
+ case 2: offset = PREP_ISA_MEM_BASE; break;
+ default: return; /* Not I/O or memory?? */
+ }
+ }
+ else
+ return; /* Not a 32-bit address */
real_addr = ld_le32((unsigned int *) (p.PPCData + 4));
if (real_addr == 0xffffffff)
return;
/* Adjust address to be as seen by CPU */
- addr = real_addr + PREP_ISA_MEM_BASE;
+ addr = real_addr + offset;
len = ld_le32((unsigned int *) (p.PPCData + 12));
if (!len)
diff -urNX .diffex linux-2.6.6-prev/include/asm-ppc/open_pic.h linux-2.6.6/include/asm-ppc/open_pic.h
--- linux-2.6.6-prev/include/asm-ppc/open_pic.h 2004-06-07 11:44:57.000000000 +0100
+++ linux-2.6.6/include/asm-ppc/open_pic.h 2004-06-09 13:59:05.000000000 +0100
@@ -23,7 +23,7 @@
#define OPENPIC_VEC_TIMER 110 /* and up */
#define OPENPIC_VEC_IPI 118 /* and up */
-#define OPENPIC_VEC_SPURIOUS 127
+#define OPENPIC_VEC_SPURIOUS 239
/* OpenPIC IRQ controller structure */
extern struct hw_interrupt_type open_pic;
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
reply other threads:[~2004-07-29 21:34 UTC|newest]
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