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Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

Browse Source 
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Cobalt: Fix UART I/O type
  [MIPS] Fixup copy_from_user_inatomic
  [MIPS] Fix struct sigcontext for N32 userland
  [MIPS] Make some __setup functions static
  [MIPS] Declare highstart_pfn, highend_pfn only if CONFIG_HIGHMEM=y
  [MIPS] Allow selection of KGDB only on platforms where it's supported.
This commit is contained in:
Linus Torvalds 2007-02-19 17:38:33 -08:00
commit 1ca9492992
10 changed files with 532 additions and 33 deletions
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14
arch/mips/Kconfig
View File

@ -144,6 +144,7 @@ config BASLER_EXCITE
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
help
The eXcite is a smart camera platform manufactured by
Basler Vision Technologies AG
@ -210,6 +211,7 @@ config MIPS_EV64120
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
help
This is an evaluation board based on the Galileo GT-64120
single-chip system controller that contains a MIPS R5000 compatible
@ -374,6 +376,7 @@ config MOMENCO_JAGUAR_ATX
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
help
The Jaguar ATX is a MIPS-based Single Board Computer (SBC) made by
Momentum Computer <http://www.momenco.com/>.
@ -391,6 +394,7 @@ config MOMENCO_OCELOT
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
help
The Ocelot is a MIPS-based Single Board Computer (SBC) made by
Momentum Computer <http://www.momenco.com/>.
@ -480,6 +484,8 @@ config DDB5477
select SYS_HAS_CPU_R5432
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_LITTLE_ENDIAN
help
This enables support for the R5432-based NEC DDB Vrc-5477,
@ -508,6 +514,7 @@ config PMC_YOSEMITE
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_SMP
help
Yosemite is an evaluation board for the RM9000x2 processor
@ -584,6 +591,7 @@ config SGI_IP27
select SYS_HAS_CPU_R10000
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_NUMA
select SYS_SUPPORTS_SMP
select GENERIC_HARDIRQS_NO__DO_IRQ
@ -633,6 +641,7 @@ config SIBYTE_SWARM
select SYS_HAS_CPU_SB1
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_LITTLE_ENDIAN
config SIBYTE_SENTOSA
@ -773,6 +782,7 @@ config TOSHIBA_RBTX4927
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
select TOSHIBA_BOARDS
select GENERIC_HARDIRQS_NO__DO_IRQ
help
@ -793,6 +803,7 @@ config TOSHIBA_RBTX4938
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_KGDB
select TOSHIBA_BOARDS
select GENERIC_HARDIRQS_NO__DO_IRQ
help
@ -959,6 +970,7 @@ config IRQ_MV64340
config DDB5XXX_COMMON
bool
select SYS_SUPPORTS_KGDB
config MIPS_BOARDS_GEN
bool
@ -1007,6 +1019,7 @@ config SOC_AU1X00
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_APM_EMULATION
select SYS_SUPPORTS_KGDB
config PNX8550
bool
@ -1019,6 +1032,7 @@ config SOC_PNX8550
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
select GENERIC_HARDIRQS_NO__DO_IRQ
select SYS_SUPPORTS_KGDB
config SWAP_IO_SPACE
bool

5
arch/mips/Kconfig.debug
View File

@ -39,7 +39,7 @@ config DEBUG_STACK_USAGE
config KGDB
bool "Remote GDB kernel debugging"
depends on DEBUG_KERNEL
depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB
select DEBUG_INFO
help
If you say Y here, it will be possible to remotely debug the MIPS
@ -48,6 +48,9 @@ config KGDB
better 32 MB RAM to avoid excessive linking time. This is only
useful for kernel hackers. If unsure, say N.
config SYS_SUPPORTS_KGDB
bool
config GDB_CONSOLE
bool "Console output to GDB"
depends on KGDB

14
arch/mips/cobalt/setup.c
View File

@ -130,7 +130,7 @@ void __init plat_mem_setup(void)
set_io_port_base(CKSEG1ADDR(GT_DEF_PCI0_IO_BASE));
/* I/O port resource must include UART and LCD/buttons */
/* I/O port resource must include LCD/buttons */
ioport_resource.end = 0x0fffffff;
/* request I/O space for devices used on all i[345]86 PCs */
@ -149,24 +149,24 @@ void __init plat_mem_setup(void)
register_pci_controller(&cobalt_pci_controller);
#endif
#ifdef CONFIG_SERIAL_8250
if (cobalt_board_id > COBALT_BRD_ID_RAQ1) {
#ifdef CONFIG_EARLY_PRINTK
cobalt_early_console();
#endif
#ifdef CONFIG_SERIAL_8250
uart.line = 0;
uart.type = PORT_UNKNOWN;
uart.uartclk = 18432000;
uart.irq = COBALT_SERIAL_IRQ;
uart.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
uart.iobase = 0xc800000;
uart.iotype = UPIO_PORT;
uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
UPF_SKIP_TEST;
uart.iotype = UPIO_MEM;
uart.mapbase = 0x1c800000;
early_serial_setup(&uart);
}
#endif
}
}
/*

2
arch/mips/kernel/cpu-probe.c
View File

@ -98,7 +98,7 @@ static void au1k_wait(void)
static int __initdata nowait = 0;
int __init wait_disable(char *s)
static int __init wait_disable(char *s)
{
nowait = 1;

4
arch/mips/kernel/setup.c
View File

@ -543,7 +543,7 @@ void __init setup_arch(char **cmdline_p)
#endif
}
int __init fpu_disable(char *s)
static int __init fpu_disable(char *s)
{
int i;
@ -555,7 +555,7 @@ int __init fpu_disable(char *s)
__setup("nofpu", fpu_disable);
int __init dsp_disable(char *s)
static int __init dsp_disable(char *s)
{
cpu_data[0].ases &= ~MIPS_ASE_DSP;

2
arch/mips/lib/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for MIPS-specific library files..
#
lib-y += csum_partial.o memcpy.o memset.o promlib.o \
lib-y += csum_partial.o memcpy.o memcpy-inatomic.o memset.o promlib.o \
strlen_user.o strncpy_user.o strnlen_user.o uncached.o
obj-y += iomap.o

436
arch/mips/lib/memcpy-inatomic.S Normal file
View File

@ -0,0 +1,436 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Unified implementation of memcpy, memmove and the __copy_user backend.
*
* Copyright (C) 1998, 99, 2000, 01, 2002 Ralf Baechle (ralf@gnu.org)
* Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
* Copyright (C) 2002 Broadcom, Inc.
* memcpy/copy_user author: Mark Vandevoorde
*
* Mnemonic names for arguments to memcpy/__copy_user
*/
/*
* Hack to resolve longstanding prefetch issue
*
* Prefetching may be fatal on some systems if we're prefetching beyond the
* end of memory on some systems. It's also a seriously bad idea on non
* dma-coherent systems.
*/
#if !defined(CONFIG_DMA_COHERENT) || !defined(CONFIG_DMA_IP27)
#undef CONFIG_CPU_HAS_PREFETCH
#endif
#ifdef CONFIG_MIPS_MALTA
#undef CONFIG_CPU_HAS_PREFETCH
#endif
#include <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/regdef.h>
#define dst a0
#define src a1
#define len a2
/*
* Spec
*
* memcpy copies len bytes from src to dst and sets v0 to dst.
* It assumes that
* - src and dst don't overlap
* - src is readable
* - dst is writable
* memcpy uses the standard calling convention
*
* __copy_user copies up to len bytes from src to dst and sets a2 (len) to
* the number of uncopied bytes due to an exception caused by a read or write.
* __copy_user assumes that src and dst don't overlap, and that the call is
* implementing one of the following:
* copy_to_user
* - src is readable (no exceptions when reading src)
* copy_from_user
* - dst is writable (no exceptions when writing dst)
* __copy_user uses a non-standard calling convention; see
* include/asm-mips/uaccess.h
*
* When an exception happens on a load, the handler must
# ensure that all of the destination buffer is overwritten to prevent
* leaking information to user mode programs.
*/
/*
* Implementation
*/
/*
* The exception handler for loads requires that:
* 1- AT contain the address of the byte just past the end of the source
* of the copy,
* 2- src_entry <= src < AT, and
* 3- (dst - src) == (dst_entry - src_entry),
* The _entry suffix denotes values when __copy_user was called.
*
* (1) is set up up by uaccess.h and maintained by not writing AT in copy_user
* (2) is met by incrementing src by the number of bytes copied
* (3) is met by not doing loads between a pair of increments of dst and src
*
* The exception handlers for stores adjust len (if necessary) and return.
* These handlers do not need to overwrite any data.
*
* For __rmemcpy and memmove an exception is always a kernel bug, therefore
* they're not protected.
*/
#define EXC(inst_reg,addr,handler) \
9: inst_reg, addr; \
.section __ex_table,"a"; \
PTR 9b, handler; \
.previous
/*
* Only on the 64-bit kernel we can made use of 64-bit registers.
*/
#ifdef CONFIG_64BIT
#define USE_DOUBLE
#endif
#ifdef USE_DOUBLE
#define LOAD ld
#define LOADL ldl
#define LOADR ldr
#define STOREL sdl
#define STORER sdr
#define STORE sd
#define ADD daddu
#define SUB dsubu
#define SRL dsrl
#define SRA dsra
#define SLL dsll
#define SLLV dsllv
#define SRLV dsrlv
#define NBYTES 8
#define LOG_NBYTES 3
/*
* As we are sharing code base with the mips32 tree (which use the o32 ABI
* register definitions). We need to redefine the register definitions from
* the n64 ABI register naming to the o32 ABI register naming.
*/
#undef t0
#undef t1
#undef t2
#undef t3
#define t0 $8
#define t1 $9
#define t2 $10
#define t3 $11
#define t4 $12
#define t5 $13
#define t6 $14
#define t7 $15
#else
#define LOAD lw
#define LOADL lwl
#define LOADR lwr
#define STOREL swl
#define STORER swr
#define STORE sw
#define ADD addu
#define SUB subu
#define SRL srl
#define SLL sll
#define SRA sra
#define SLLV sllv
#define SRLV srlv
#define NBYTES 4
#define LOG_NBYTES 2
#endif /* USE_DOUBLE */
#ifdef CONFIG_CPU_LITTLE_ENDIAN
#define LDFIRST LOADR
#define LDREST LOADL
#define STFIRST STORER
#define STREST STOREL
#define SHIFT_DISCARD SLLV
#else
#define LDFIRST LOADL
#define LDREST LOADR
#define STFIRST STOREL
#define STREST STORER
#define SHIFT_DISCARD SRLV
#endif
#define FIRST(unit) ((unit)*NBYTES)
#define REST(unit) (FIRST(unit)+NBYTES-1)
#define UNIT(unit) FIRST(unit)
#define ADDRMASK (NBYTES-1)
.text
.set noreorder
.set noat
/*
* A combined memcpy/__copy_user
* __copy_user sets len to 0 for success; else to an upper bound of
* the number of uncopied bytes.
* memcpy sets v0 to dst.
*/
.align 5
LEAF(__copy_user_inatomic)
/*
* Note: dst & src may be unaligned, len may be 0
* Temps
*/
#define rem t8
/*
* The "issue break"s below are very approximate.
* Issue delays for dcache fills will perturb the schedule, as will
* load queue full replay traps, etc.
*
* If len < NBYTES use byte operations.
*/
PREF( 0, 0(src) )
PREF( 1, 0(dst) )
sltu t2, len, NBYTES
and t1, dst, ADDRMASK
PREF( 0, 1*32(src) )
PREF( 1, 1*32(dst) )
bnez t2, copy_bytes_checklen
and t0, src, ADDRMASK
PREF( 0, 2*32(src) )
PREF( 1, 2*32(dst) )
bnez t1, dst_unaligned
nop
bnez t0, src_unaligned_dst_aligned
/*
* use delay slot for fall-through
* src and dst are aligned; need to compute rem
*/
both_aligned:
SRL t0, len, LOG_NBYTES+3 # +3 for 8 units/iter
beqz t0, cleanup_both_aligned # len < 8*NBYTES
and rem, len, (8*NBYTES-1) # rem = len % (8*NBYTES)
PREF( 0, 3*32(src) )
PREF( 1, 3*32(dst) )
.align 4
1:
EXC( LOAD t0, UNIT(0)(src), l_exc)
EXC( LOAD t1, UNIT(1)(src), l_exc_copy)
EXC( LOAD t2, UNIT(2)(src), l_exc_copy)
EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
SUB len, len, 8*NBYTES
EXC( LOAD t4, UNIT(4)(src), l_exc_copy)
EXC( LOAD t7, UNIT(5)(src), l_exc_copy)
STORE t0, UNIT(0)(dst)
STORE t1, UNIT(1)(dst)
EXC( LOAD t0, UNIT(6)(src), l_exc_copy)
EXC( LOAD t1, UNIT(7)(src), l_exc_copy)
ADD src, src, 8*NBYTES
ADD dst, dst, 8*NBYTES
STORE t2, UNIT(-6)(dst)
STORE t3, UNIT(-5)(dst)
STORE t4, UNIT(-4)(dst)
STORE t7, UNIT(-3)(dst)
STORE t0, UNIT(-2)(dst)
STORE t1, UNIT(-1)(dst)
PREF( 0, 8*32(src) )
PREF( 1, 8*32(dst) )
bne len, rem, 1b
nop
/*
* len == rem == the number of bytes left to copy < 8*NBYTES
*/
cleanup_both_aligned:
beqz len, done
sltu t0, len, 4*NBYTES
bnez t0, less_than_4units
and rem, len, (NBYTES-1) # rem = len % NBYTES
/*
* len >= 4*NBYTES
*/
EXC( LOAD t0, UNIT(0)(src), l_exc)
EXC( LOAD t1, UNIT(1)(src), l_exc_copy)
EXC( LOAD t2, UNIT(2)(src), l_exc_copy)
EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
SUB len, len, 4*NBYTES
ADD src, src, 4*NBYTES
STORE t0, UNIT(0)(dst)
STORE t1, UNIT(1)(dst)
STORE t2, UNIT(2)(dst)
STORE t3, UNIT(3)(dst)
beqz len, done
ADD dst, dst, 4*NBYTES
less_than_4units:
/*
* rem = len % NBYTES
*/
beq rem, len, copy_bytes
nop
1:
EXC( LOAD t0, 0(src), l_exc)
ADD src, src, NBYTES
SUB len, len, NBYTES
STORE t0, 0(dst)
bne rem, len, 1b
ADD dst, dst, NBYTES
/*
* src and dst are aligned, need to copy rem bytes (rem < NBYTES)
* A loop would do only a byte at a time with possible branch
* mispredicts. Can't do an explicit LOAD dst,mask,or,STORE
* because can't assume read-access to dst. Instead, use
* STREST dst, which doesn't require read access to dst.
*
* This code should perform better than a simple loop on modern,
* wide-issue mips processors because the code has fewer branches and
* more instruction-level parallelism.
*/
#define bits t2
beqz len, done
ADD t1, dst, len # t1 is just past last byte of dst
li bits, 8*NBYTES
SLL rem, len, 3 # rem = number of bits to keep
EXC( LOAD t0, 0(src), l_exc)
SUB bits, bits, rem # bits = number of bits to discard
SHIFT_DISCARD t0, t0, bits
STREST t0, -1(t1)
jr ra
move len, zero
dst_unaligned:
/*
* dst is unaligned
* t0 = src & ADDRMASK
* t1 = dst & ADDRMASK; T1 > 0
* len >= NBYTES
*
* Copy enough bytes to align dst
* Set match = (src and dst have same alignment)
*/
#define match rem
EXC( LDFIRST t3, FIRST(0)(src), l_exc)
ADD t2, zero, NBYTES
EXC( LDREST t3, REST(0)(src), l_exc_copy)
SUB t2, t2, t1 # t2 = number of bytes copied
xor match, t0, t1
STFIRST t3, FIRST(0)(dst)
beq len, t2, done
SUB len, len, t2
ADD dst, dst, t2
beqz match, both_aligned
ADD src, src, t2
src_unaligned_dst_aligned:
SRL t0, len, LOG_NBYTES+2 # +2 for 4 units/iter
PREF( 0, 3*32(src) )
beqz t0, cleanup_src_unaligned
and rem, len, (4*NBYTES-1) # rem = len % 4*NBYTES
PREF( 1, 3*32(dst) )
1:
/*
* Avoid consecutive LD*'s to the same register since some mips
* implementations can't issue them in the same cycle.
* It's OK to load FIRST(N+1) before REST(N) because the two addresses
* are to the same unit (unless src is aligned, but it's not).
*/
EXC( LDFIRST t0, FIRST(0)(src), l_exc)
EXC( LDFIRST t1, FIRST(1)(src), l_exc_copy)
SUB len, len, 4*NBYTES
EXC( LDREST t0, REST(0)(src), l_exc_copy)
EXC( LDREST t1, REST(1)(src), l_exc_copy)
EXC( LDFIRST t2, FIRST(2)(src), l_exc_copy)
EXC( LDFIRST t3, FIRST(3)(src), l_exc_copy)
EXC( LDREST t2, REST(2)(src), l_exc_copy)
EXC( LDREST t3, REST(3)(src), l_exc_copy)
PREF( 0, 9*32(src) ) # 0 is PREF_LOAD (not streamed)
ADD src, src, 4*NBYTES
#ifdef CONFIG_CPU_SB1
nop # improves slotting
#endif
STORE t0, UNIT(0)(dst)
STORE t1, UNIT(1)(dst)
STORE t2, UNIT(2)(dst)
STORE t3, UNIT(3)(dst)
PREF( 1, 9*32(dst) ) # 1 is PREF_STORE (not streamed)
bne len, rem, 1b
ADD dst, dst, 4*NBYTES
cleanup_src_unaligned:
beqz len, done
and rem, len, NBYTES-1 # rem = len % NBYTES
beq rem, len, copy_bytes
nop
1:
EXC( LDFIRST t0, FIRST(0)(src), l_exc)
EXC( LDREST t0, REST(0)(src), l_exc_copy)
ADD src, src, NBYTES
SUB len, len, NBYTES
STORE t0, 0(dst)
bne len, rem, 1b
ADD dst, dst, NBYTES
copy_bytes_checklen:
beqz len, done
nop
copy_bytes:
/* 0 < len < NBYTES */
#define COPY_BYTE(N) \
EXC( lb t0, N(src), l_exc); \
SUB len, len, 1; \
beqz len, done; \
sb t0, N(dst)
COPY_BYTE(0)
COPY_BYTE(1)
#ifdef USE_DOUBLE
COPY_BYTE(2)
COPY_BYTE(3)
COPY_BYTE(4)
COPY_BYTE(5)
#endif
EXC( lb t0, NBYTES-2(src), l_exc)
SUB len, len, 1
jr ra
sb t0, NBYTES-2(dst)
done:
jr ra
nop
END(__copy_user_inatomic)
l_exc_copy:
/*
* Copy bytes from src until faulting load address (or until a
* lb faults)
*
* When reached by a faulting LDFIRST/LDREST, THREAD_BUADDR($28)
* may be more than a byte beyond the last address.
* Hence, the lb below may get an exception.
*
* Assumes src < THREAD_BUADDR($28)
*/
LOAD t0, TI_TASK($28)
nop
LOAD t0, THREAD_BUADDR(t0)
1:
EXC( lb t1, 0(src), l_exc)
ADD src, src, 1
sb t1, 0(dst) # can't fault -- we're copy_from_user
bne src, t0, 1b
ADD dst, dst, 1
l_exc:
LOAD t0, TI_TASK($28)
nop
LOAD t0, THREAD_BUADDR(t0) # t0 is just past last good address
nop
SUB len, AT, t0 # len number of uncopied bytes
jr ra
nop

4
arch/mips/mm/init.c
View File

@ -61,8 +61,6 @@
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long highstart_pfn, highend_pfn;
/*
* We have up to 8 empty zeroed pages so we can map one of the right colour
* when needed. This is necessary only on R4000 / R4400 SC and MC versions
@ -261,6 +259,8 @@ EXPORT_SYMBOL(copy_from_user_page);
#ifdef CONFIG_HIGHMEM
unsigned long highstart_pfn, highend_pfn;
pte_t *kmap_pte;
pgprot_t kmap_prot;

33
include/asm-mips/sigcontext.h
View File

@ -42,6 +42,7 @@ struct sigcontext {
#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
#include <linux/posix_types.h>
/*
* Keep this struct definition in sync with the sigcontext fragment
* in arch/mips/tools/offset.c
@ -53,27 +54,25 @@ struct sigcontext {
* entries, add sc_dsp and sc_reserved for padding. No prisoners.
*/
struct sigcontext {
unsigned long sc_regs[32];
unsigned long sc_fpregs[32];
unsigned long sc_mdhi;
unsigned long sc_hi1;
unsigned long sc_hi2;
unsigned long sc_hi3;
unsigned long sc_mdlo;
unsigned long sc_lo1;
unsigned long sc_lo2;
unsigned long sc_lo3;
unsigned long sc_pc;
unsigned int sc_fpc_csr;
unsigned int sc_used_math;
unsigned int sc_dsp;
unsigned int sc_reserved;
__u64 sc_regs[32];
__u64 sc_fpregs[32];
__u64 sc_mdhi;
__u64 sc_hi1;
__u64 sc_hi2;
__u64 sc_hi3;
__u64 sc_mdlo;
__u64 sc_lo1;
__u64 sc_lo2;
__u64 sc_lo3;
__u64 sc_pc;
__u32 sc_fpc_csr;
__u32 sc_used_math;
__u32 sc_dsp;
__u32 sc_reserved;
};
#ifdef __KERNEL__
#include <linux/posix_types.h>
struct sigcontext32 {
__u32 sc_regmask; /* Unused */
__u32 sc_status; /* Unused */

51
include/asm-mips/uaccess.h
View File

@ -435,8 +435,32 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
__cu_len; \
})
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
#define __copy_to_user_inatomic(to,from,n) \
({ \
void __user *__cu_to; \
const void *__cu_from; \
long __cu_len; \
\
__cu_to = (to); \
__cu_from = (from); \
__cu_len = (n); \
__cu_len = __invoke_copy_to_user(__cu_to, __cu_from, __cu_len); \
__cu_len; \
})
#define __copy_from_user_inatomic(to,from,n) \
({ \
void *__cu_to; \
const void __user *__cu_from; \
long __cu_len; \
\
__cu_to = (to); \
__cu_from = (from); \
__cu_len = (n); \
__cu_len = __invoke_copy_from_user_inatomic(__cu_to, __cu_from, \
__cu_len); \
__cu_len; \
})
/*
* copy_to_user: - Copy a block of data into user space.
@ -490,6 +514,29 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
__cu_len_r; \
})
#define __invoke_copy_from_user_inatomic(to,from,n) \
({ \
register void *__cu_to_r __asm__ ("$4"); \
register const void __user *__cu_from_r __asm__ ("$5"); \
register long __cu_len_r __asm__ ("$6"); \
\
__cu_to_r = (to); \
__cu_from_r = (from); \
__cu_len_r = (n); \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
__MODULE_JAL(__copy_user_inatomic) \
".set\tnoat\n\t" \
__UA_ADDU "\t$1, %1, %2\n\t" \
".set\tat\n\t" \
".set\treorder" \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
"memory"); \
__cu_len_r; \
})
/*
* __copy_from_user: - Copy a block of data from user space, with less checking.
* @to: Destination address, in kernel space.