Revision c77a036beceabbfd85b366193685cb49f38292bd authored by Mark Nelson on 23 October 2008, 03:08:16 UTC, committed by Jeff Garzik on 28 October 2008, 03:54:55 UTC
Add an appropriate entry for the Promise PDC42819 controller. It has an AHCI mode and so far works correctly with board_ahci. This chip is found on Promise's FastTrak TX2650 (2 port) and TX4650 (4 port) software-based RAID cards (for which there is a binary driver, t3sas) and can be found on some motherboards, for example the MSI K9A2 Platinum, which calls the chip a Promise T3 controller. Although this controller also supports SAS devices, its default bootup mode is AHCI and the binary driver has to do some magic to get the chip into the appropriate mode to drive SAS disks. Seeing as no documentation is provided by Promise, adding this entry to the ahci driver allows the controller to be useful to people as a SATA controller (with no ill effects on the system if a SAS disk is connected - probing of the port just times out with "link online but device misclassified"), without having to resort to using the binary driver. Users who require SAS or the proprietary software raid can get this functionality using the binary driver. Signed-off-by: Mark Nelson <mdnelson8@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
1 parent ab77163
extable.c
/* Rewritten by Rusty Russell, on the backs of many others...
Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <asm/sections.h>
extern struct exception_table_entry __start___ex_table[];
extern struct exception_table_entry __stop___ex_table[];
/* Sort the kernel's built-in exception table */
void __init sort_main_extable(void)
{
sort_extable(__start___ex_table, __stop___ex_table);
}
/* Given an address, look for it in the exception tables. */
const struct exception_table_entry *search_exception_tables(unsigned long addr)
{
const struct exception_table_entry *e;
e = search_extable(__start___ex_table, __stop___ex_table-1, addr);
if (!e)
e = search_module_extables(addr);
return e;
}
int core_kernel_text(unsigned long addr)
{
if (addr >= (unsigned long)_stext &&
addr <= (unsigned long)_etext)
return 1;
if (system_state == SYSTEM_BOOTING &&
addr >= (unsigned long)_sinittext &&
addr <= (unsigned long)_einittext)
return 1;
return 0;
}
int __kernel_text_address(unsigned long addr)
{
if (core_kernel_text(addr))
return 1;
return __module_text_address(addr) != NULL;
}
int kernel_text_address(unsigned long addr)
{
if (core_kernel_text(addr))
return 1;
return module_text_address(addr) != NULL;
}
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