From: ths@networkno.de
To: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Subject: [PATCH, 2.6.18] Implement missing flush_cache_data_page on SB-1(a)
Date: Tue, 24 Oct 2006 00:37:53 +0100 [thread overview]
Message-ID: <20061023233753.GA11979@mips.com> (raw)
The appended patch implements flush_data_cache_page for SB-1(a). This
fixes the bcm1480 hanging at boot after "Freeing unused kernel memory"
when booting from NFS (and likely also any other PIO-driven device).
Thiemo
Signed-Off-By: Thiemo Seufer <ths@networkno.de>
diff --git a/arch/mips/mm/c-sb1.c b/arch/mips/mm/c-sb1.c
index 16bad7c..acae51c 100644
--- a/arch/mips/mm/c-sb1.c
+++ b/arch/mips/mm/c-sb1.c
@@ -19,6 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/init.h>
+#include <linux/hardirq.h>
#include <asm/asm.h>
#include <asm/bootinfo.h>
@@ -233,6 +234,25 @@ void sb1_flush_cache_page(struct vm_area
__attribute__((alias("local_sb1_flush_cache_page")));
#endif
+#ifdef CONFIG_SMP
+static void sb1_flush_cache_data_page_ipi(void *info)
+{
+ unsigned long start = (unsigned long)info;
+
+ __sb1_writeback_inv_dcache_range(start, start + PAGE_SIZE);
+}
+
+static void sb1_flush_cache_data_page(unsigned long addr)
+{
+ if (in_atomic())
+ __sb1_writeback_inv_dcache_range(addr, addr + PAGE_SIZE);
+ else
+ on_each_cpu(sb1_flush_cache_data_page_ipi, (void *) addr, 1, 1);
+}
+#else
+void sb1_flush_cache_data_page(unsigned long)
+ __attribute__((alias("local_sb1_flush_cache_data_page")));
+#endif
/*
* Invalidate all caches on this CPU
@@ -504,7 +524,6 @@ static __init void probe_cache_sizes(voi
void sb1_cache_init(void)
{
extern char except_vec2_sb1;
- extern char handle_vec2_sb1;
/* Special cache error handler for SB1 */
set_uncached_handler (0x100, &except_vec2_sb1, 0x80);
@@ -534,7 +553,7 @@ #endif
flush_cache_sigtramp = sb1_flush_cache_sigtramp;
local_flush_data_cache_page = (void *) sb1_nop;
- flush_data_cache_page = (void *) sb1_nop;
+ flush_data_cache_page = sb1_flush_cache_data_page;
/* Full flush */
__flush_cache_all = sb1___flush_cache_all;
@@ -558,5 +577,5 @@ #endif
:
: "memory");
- flush_cache_all();
+ local_sb1___flush_cache_all();
}
reply other threads:[~2006-10-23 23:38 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20061023233753.GA11979@mips.com \
--to=ths@networkno.de \
--cc=linux-mips@linux-mips.org \
--cc=ralf@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.