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[PARISC] Make sure use of RFI conforms to PA 2.0 and 1.1 arch docs

Browse Source 
2.6.12-rc4-pa3 : first pass at making sure use of RFI conforms to
PA 2.0 arch pages F-4 and F-5, PA 1.1 Arch page 3-19 and 3-20.

The discussion revolves around all the rules for clearing PSW Q-bit.
The hard part is meeting all the rules for "relied upon translation".

.align directive is used to guarantee the critical sequence ends more than
8 instructions (32 bytes) from the end of page.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Grant Grundler
2005-10-21 22:40:07 -04:00
committed by Kyle McMartin
parent b2c1fe81df
commit 896a375623
7 changed files with 154 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-parisc/psw.h
+26 -25
View File
@@ -1,4 +1,7 @@
#ifndef _PARISC_PSW_H
#include <linux/config.h>
#define PSW_I 0x00000001
#define PSW_D 0x00000002
#define PSW_P 0x00000004
@@ -9,6 +12,16 @@
#define PSW_G 0x00000040 /* PA1.x only */
#define PSW_O 0x00000080 /* PA2.0 only */
/* ssm/rsm instructions number PSW_W and PSW_E differently */
#define PSW_SM_I PSW_I /* Enable External Interrupts */
#define PSW_SM_D PSW_D
#define PSW_SM_P PSW_P
#define PSW_SM_Q PSW_Q /* Enable Interrupt State Collection */
#define PSW_SM_R PSW_R /* Enable Recover Counter Trap */
#define PSW_SM_W 0x200 /* PA2.0 only : Enable Wide Mode */
#define PSW_SM_QUIET PSW_SM_R+PSW_SM_Q+PSW_SM_P+PSW_SM_D+PSW_SM_I
#define PSW_CB 0x0000ff00
#define PSW_M 0x00010000
@@ -30,33 +43,21 @@
#define PSW_Z 0x40000000 /* PA1.x only */
#define PSW_Y 0x80000000 /* PA1.x only */
#ifdef __LP64__
#define PSW_HI_CB 0x000000ff /* PA2.0 only */
#ifdef CONFIG_64BIT
# define PSW_HI_CB 0x000000ff /* PA2.0 only */
#endif
/* PSW bits to be used with ssm/rsm */
#define PSW_SM_I 0x1
#define PSW_SM_D 0x2
#define PSW_SM_P 0x4
#define PSW_SM_Q 0x8
#define PSW_SM_R 0x10
#define PSW_SM_F 0x20
#define PSW_SM_G 0x40
#define PSW_SM_O 0x80
#define PSW_SM_E 0x100
#define PSW_SM_W 0x200
#ifdef __LP64__
# define USER_PSW (PSW_C | PSW_Q | PSW_P | PSW_D | PSW_I)
# define KERNEL_PSW (PSW_W | PSW_C | PSW_Q | PSW_P | PSW_D)
# define REAL_MODE_PSW (PSW_W | PSW_Q)
# define USER_PSW_MASK (PSW_W | PSW_T | PSW_N | PSW_X | PSW_B | PSW_V | PSW_CB)
# define USER_PSW_HI_MASK (PSW_HI_CB)
#else
# define USER_PSW (PSW_C | PSW_Q | PSW_P | PSW_D | PSW_I)
# define KERNEL_PSW (PSW_C | PSW_Q | PSW_P | PSW_D)
# define REAL_MODE_PSW (PSW_Q)
# define USER_PSW_MASK (PSW_T | PSW_N | PSW_X | PSW_B | PSW_V | PSW_CB)
#ifdef CONFIG_64BIT
# define USER_PSW_HI_MASK PSW_HI_CB
# define WIDE_PSW PSW_W
#else
# define WIDE_PSW 0
#endif
/* Used when setting up for rfi */
#define KERNEL_PSW (WIDE_PSW | PSW_C | PSW_Q | PSW_P | PSW_D)
#define REAL_MODE_PSW (WIDE_PSW | PSW_Q)
#define USER_PSW_MASK (WIDE_PSW | PSW_T | PSW_N | PSW_X | PSW_B | PSW_V | PSW_CB)
#define USER_PSW (PSW_C | PSW_Q | PSW_P | PSW_D | PSW_I)
#endif