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metag: make TXPRIVEXT bits explicit 

Define PRIV_BITS using explicit constants from <asm/metag_regs.h> rather
than with a hard coded value. This also adds a couple of missing
definitions for the TXPRIVEXT priv bits for protecting writes to TXTIMER
and the trace registers.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
This commit is contained in:
James Hogan 2013-01-31 13:27:35 +00:00
parent 82f0167aa4
commit c787c2d62f
2 changed files with 32 additions and 8 deletions
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4
arch/metag/include/asm/metag_regs.h
View File

@ -414,6 +414,10 @@
#define TXPRIVEXT_REGNUM 29
#define TXPRIVEXT_COPRO_BITS 0xFF000000 /* Co-processor 0-7 */
#define TXPRIVEXT_COPRO_S 24
#ifndef METAC_1_2
#define TXPRIVEXT_TXTIMER_BIT 0x00080000 /* TXTIMER priv */
#define TXPRIVEXT_TRACE_BIT 0x00040000 /* TTEXEC|TTCTRL|GTEXEC */
#endif
#define TXPRIVEXT_TXTRIGGER_BIT 0x00020000 /* TXSTAT|TXMASK|TXPOLL */
#define TXPRIVEXT_TXGBLCREG_BIT 0x00010000 /* Global common regs */
#define TXPRIVEXT_CBPRIV_BIT 0x00008000 /* Mem i/f dump priv */

36
arch/metag/kernel/setup.c
View File

@ -35,6 +35,7 @@
#include <asm/hwthread.h>
#include <asm/l2cache.h>
#include <asm/mach/arch.h>
#include <asm/metag_regs.h>
#include <asm/mmu.h>
#include <asm/mmzone.h>
#include <asm/processor.h>
@ -43,18 +44,37 @@
#include <asm/setup.h>
#include <asm/traps.h>
/* PRIV protect as many registers as possible. */
#define DEFAULT_PRIV 0xff0f7f00
/* Priv protect as many registers as possible. */
#define DEFAULT_PRIV (TXPRIVEXT_COPRO_BITS | \
TXPRIVEXT_TXTRIGGER_BIT | \
TXPRIVEXT_TXGBLCREG_BIT | \
TXPRIVEXT_ILOCK_BIT | \
TXPRIVEXT_TXITACCYC_BIT | \
TXPRIVEXT_TXDIVTIME_BIT | \
TXPRIVEXT_TXAMAREGX_BIT | \
TXPRIVEXT_TXTIMERI_BIT | \
TXPRIVEXT_TXSTATUS_BIT | \
TXPRIVEXT_TXDISABLE_BIT)
/* Enable unaligned access checking. */
#define UNALIGNED_PRIV 0x00000010
#ifdef CONFIG_METAG_UNALIGNED
#define PRIV_BITS (DEFAULT_PRIV | UNALIGNED_PRIV)
/* Meta2 specific bits. */
#ifdef CONFIG_METAG_META12
#define META2_PRIV 0
#else
#define PRIV_BITS DEFAULT_PRIV
#define META2_PRIV (TXPRIVEXT_TXTIMER_BIT | \
TXPRIVEXT_TRACE_BIT)
#endif
/* Unaligned access checking bits. */
#ifdef CONFIG_METAG_UNALIGNED
#define UNALIGNED_PRIV TXPRIVEXT_ALIGNREW_BIT
#else
#define UNALIGNED_PRIV 0
#endif
#define PRIV_BITS (DEFAULT_PRIV | \
META2_PRIV | \
UNALIGNED_PRIV)
extern char _heap_start[];
#ifdef CONFIG_METAG_BUILTIN_DTB