Commit 463020ce authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Fix sigset_t endianess swapping issues in 32-bit compat code.
  [MIPS] Fix uniprocessor Sibyte builds.
  [MIPS] Make entry.S a little more readable.
  [MIPS] Remove stray instruction from __get_user_asm_ll32.
  [MIPS] 32-bit: Fix warning about cast for fetching pointer from userspace.
  [MIPS] DECstation: Fix irq handling
  [MIPS] signals: make common _BLOCKABLE macro
  [MIPS] signal: Move sigframe definition for native O32/N64 into signal.c
  [MIPS] signal: Move {restore,setup}_sigcontext prototypes to their user
  [MIPS] signal: Fix warnings in o32 compat code.
  [MIPS] IP27: Enable N32 support in defconfig.
  Revert "[MIPS] Fix warning in get_user when fetching pointer object from userspace."
  [MIPS] Don't claim we support dma_declare_coherent_memory - we don't.
  [MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}
  [MIPS] Improve branch prediction in ll/sc atomic operations.
parents 58a3bb59 431dc804
......@@ -598,8 +598,6 @@ config SGI_IP32
select ARC
select ARC32
select BOOT_ELF32
select OWN_DMA
select DMA_IP32
select DMA_NONCOHERENT
select HW_HAS_PCI
select R5000_CPU_SCACHE
......@@ -883,9 +881,6 @@ config DMA_NONCOHERENT
config DMA_NEED_PCI_MAP_STATE
bool
config OWN_DMA
bool
config EARLY_PRINTK
bool
......
......@@ -264,7 +264,7 @@ CONFIG_BINFMT_ELF=y
CONFIG_MIPS32_COMPAT=y
CONFIG_COMPAT=y
CONFIG_MIPS32_O32=y
# CONFIG_MIPS32_N32 is not set
CONFIG_MIPS32_N32=y
CONFIG_BINFMT_ELF32=y
#
......
......@@ -264,9 +264,6 @@
srlv t3,t1,t2
handle_it:
LONG_L s0, TI_REGS($28)
LONG_S sp, TI_REGS($28)
PTR_LA ra, ret_from_irq
j dec_irq_dispatch
nop
......@@ -277,7 +274,6 @@ fpu:
#endif
spurious:
PTR_LA ra, _ret_from_irq
j spurious_interrupt
nop
END(plat_irq_dispatch)
......
......@@ -21,24 +21,21 @@
#endif
#ifndef CONFIG_PREEMPT
.macro preempt_stop
local_irq_disable
.endm
#define resume_kernel restore_all
#else
#define __ret_from_irq ret_from_exception
#endif
.text
.align 5
FEXPORT(ret_from_irq)
LONG_S s0, TI_REGS($28)
#ifdef CONFIG_PREEMPT
FEXPORT(ret_from_exception)
#else
b _ret_from_irq
#ifndef CONFIG_PREEMPT
FEXPORT(ret_from_exception)
preempt_stop
local_irq_disable # preempt stop
b __ret_from_irq
#endif
FEXPORT(_ret_from_irq)
FEXPORT(ret_from_irq)
LONG_S s0, TI_REGS($28)
FEXPORT(__ret_from_irq)
LONG_L t0, PT_STATUS(sp) # returning to kernel mode?
andi t0, t0, KU_USER
beqz t0, resume_kernel
......
......@@ -39,6 +39,7 @@
#include <net/sock.h>
#include <net/scm.h>
#include <asm/compat-signal.h>
#include <asm/ipc.h>
#include <asm/sim.h>
#include <asm/uaccess.h>
......@@ -736,3 +737,49 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs)
return do_fork(clone_flags, newsp, &regs, 0,
parent_tidptr, child_tidptr);
}
/*
* Implement the event wait interface for the eventpoll file. It is the kernel
* part of the user space epoll_pwait(2).
*/
asmlinkage long compat_sys_epoll_pwait(int epfd,
struct epoll_event __user *events, int maxevents, int timeout,
const compat_sigset_t __user *sigmask, size_t sigsetsize)
{
int error;
sigset_t ksigmask, sigsaved;
/*
* If the caller wants a certain signal mask to be set during the wait,
* we apply it here.
*/
if (sigmask) {
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
if (!access_ok(VERIFY_READ, sigmask, sizeof(ksigmask)))
return -EFAULT;
if (__copy_conv_sigset_from_user(&ksigmask, sigmask))
return -EFAULT;
sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
}
error = sys_epoll_wait(epfd, events, maxevents, timeout);
/*
* If we changed the signal mask, we need to restore the original one.
* In case we've got a signal while waiting, we do not restore the
* signal mask yet, and we allow do_signal() to deliver the signal on
* the way back to userspace, before the signal mask is restored.
*/
if (sigmask) {
if (error == -EINTR) {
memcpy(&current->saved_sigmask, &sigsaved,
sizeof(sigsaved));
set_thread_flag(TIF_RESTORE_SIGMASK);
} else
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
}
return error;
}
......@@ -470,4 +470,4 @@ sys_call_table:
PTR sys_get_robust_list
PTR sys_kexec_load /* 5270 */
PTR sys_getcpu
PTR sys_epoll_pwait
PTR compat_sys_epoll_pwait
......@@ -396,4 +396,4 @@ EXPORT(sysn32_call_table)
PTR compat_sys_get_robust_list
PTR compat_sys_kexec_load
PTR sys_getcpu
PTR sys_epoll_pwait
PTR compat_sys_epoll_pwait
......@@ -19,37 +19,7 @@
# define DEBUGP(fmt, args...)
#endif
/*
* Horribly complicated - with the bloody RM9000 workarounds enabled
* the signal trampolines is moving to the end of the structure so we can
* increase the alignment without breaking software compatibility.
*/
#if ICACHE_REFILLS_WORKAROUND_WAR == 0
struct sigframe {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_code[2]; /* signal trampoline */
struct sigcontext sf_sc;
sigset_t sf_mask;
};
#else /* ICACHE_REFILLS_WORKAROUND_WAR */
struct sigframe {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_pad[2];
struct sigcontext sf_sc; /* hw context */
sigset_t sf_mask;
u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */
};
#endif /* !ICACHE_REFILLS_WORKAROUND_WAR */
/*
* handle hardware context
*/
extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
/*
* Determine which stack to use..
......
......@@ -34,10 +34,20 @@
#include "signal-common.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
/*
* Horribly complicated - with the bloody RM9000 workarounds enabled
* the signal trampolines is moving to the end of the structure so we can
* increase the alignment without breaking software compatibility.
*/
#if ICACHE_REFILLS_WORKAROUND_WAR == 0
struct sigframe {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_code[2]; /* signal trampoline */
struct sigcontext sf_sc;
sigset_t sf_mask;
};
struct rt_sigframe {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_code[2]; /* signal trampoline */
......@@ -47,6 +57,14 @@ struct rt_sigframe {
#else
struct sigframe {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_pad[2];
struct sigcontext sf_sc; /* hw context */
sigset_t sf_mask;
u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */
};
struct rt_sigframe {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_pad[2];
......
......@@ -8,6 +8,7 @@
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#include <linux/cache.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
......@@ -24,6 +25,7 @@
#include <asm/abi.h>
#include <asm/asm.h>
#include <asm/compat-signal.h>
#include <linux/bitops.h>
#include <asm/cacheflush.h>
#include <asm/sim.h>
......@@ -104,8 +106,6 @@ typedef struct compat_siginfo {
#define __NR_O32_rt_sigreturn 4193
#define __NR_O32_restart_syscall 4253
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
/* 32-bit compatibility types */
#define _NSIG_BPW32 32
......@@ -139,8 +139,20 @@ struct ucontext32 {
sigset_t32 uc_sigmask; /* mask last for extensibility */
};
/*
* Horribly complicated - with the bloody RM9000 workarounds enabled
* the signal trampolines is moving to the end of the structure so we can
* increase the alignment without breaking software compatibility.
*/
#if ICACHE_REFILLS_WORKAROUND_WAR == 0
struct sigframe32 {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_code[2]; /* signal trampoline */
struct sigcontext32 sf_sc;
sigset_t sf_mask;
};
struct rt_sigframe32 {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_code[2]; /* signal trampoline */
......@@ -150,6 +162,14 @@ struct rt_sigframe32 {
#else /* ICACHE_REFILLS_WORKAROUND_WAR */
struct sigframe32 {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_pad[2];
struct sigcontext32 sf_sc; /* hw context */
sigset_t sf_mask;
u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */
};
struct rt_sigframe32 {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_pad[2];
......@@ -493,13 +513,13 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe __user *frame;
struct sigframe32 __user *frame;
sigset_t blocked;
frame = (struct sigframe __user *) regs.regs[29];
frame = (struct sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
goto badframe;
sigdelsetmask(&blocked, ~_BLOCKABLE);
......@@ -536,7 +556,7 @@ asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
frame = (struct rt_sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
......@@ -581,7 +601,7 @@ badframe:
int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
int signr, sigset_t *set)
{
struct sigframe __user *frame;
struct sigframe32 __user *frame;
int err = 0;
frame = get_sigframe(ka, regs, sizeof(*frame));
......@@ -591,7 +611,8 @@ int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn);
err |= setup_sigcontext32(regs, &frame->sf_sc);
err |= __copy_to_user(&frame->sf_mask, set, sizeof(*set));
err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
if (err)
goto give_sigsegv;
......@@ -650,7 +671,7 @@ int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
goto give_sigsegv;
......
......@@ -31,6 +31,7 @@
#include <asm/asm.h>
#include <asm/cacheflush.h>
#include <asm/compat-signal.h>
#include <asm/sim.h>
#include <asm/uaccess.h>
#include <asm/ucontext.h>
......@@ -47,7 +48,9 @@
#define __NR_N32_rt_sigreturn 6211
#define __NR_N32_restart_syscall 6214
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
/* IRIX compatible stack_t */
typedef struct sigaltstack32 {
......@@ -61,7 +64,7 @@ struct ucontextn32 {
s32 uc_link;
stack32_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask; /* mask last for extensibility */
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
#if ICACHE_REFILLS_WORKAROUND_WAR == 0
......@@ -127,7 +130,7 @@ asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
......@@ -193,7 +196,7 @@ int setup_rt_frame_n32(struct k_sigaction * ka,
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
goto give_sigsegv;
......
......@@ -2,8 +2,8 @@
# Makefile for the Linux/MIPS-specific parts of the memory manager.
#
obj-y += cache.o extable.o fault.o init.o pgtable.o \
tlbex.o tlbex-fault.o
obj-y += cache.o dma-default.o extable.o fault.o \
init.o pgtable.o tlbex.o tlbex-fault.o
obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o
obj-$(CONFIG_64BIT) += pgtable-64.o
......@@ -32,14 +32,4 @@ obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o
obj-$(CONFIG_RM7000_CPU_SCACHE) += sc-rm7k.o
obj-$(CONFIG_MIPS_CPU_SCACHE) += sc-mips.o
#
# Choose one DMA coherency model
#
ifndef CONFIG_OWN_DMA
obj-$(CONFIG_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o
endif
obj-$(CONFIG_DMA_IP27) += dma-ip27.o
obj-$(CONFIG_DMA_IP32) += dma-ip32.o
EXTRA_AFLAGS := $(CFLAGS)
......@@ -259,6 +259,12 @@ static void sb1_flush_cache_data_page(unsigned long addr)
on_each_cpu(sb1_flush_cache_data_page_ipi, (void *) addr, 1, 1);
}
#else
static void local_sb1_flush_cache_data_page(unsigned long addr)
{
__sb1_writeback_inv_dcache_range(addr, addr + PAGE_SIZE);
}
void sb1_flush_cache_data_page(unsigned long)
__attribute__((alias("local_sb1_flush_cache_data_page")));
#endif
......
/*
* 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.
*
* Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
* Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
* swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
*/
#include <linux/types.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/string.h>
#include <asm/cache.h>
#include <asm/io.h>
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
gfp |= GFP_DMA;
ret = (void *) __get_free_pages(gfp, get_order(size));
if (ret != NULL) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
}
return ret;
}
EXPORT_SYMBOL(dma_alloc_noncoherent);
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
__attribute__((alias("dma_alloc_noncoherent")));
EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
unsigned long addr = (unsigned long) vaddr;
free_pages(addr, get_order(size));
}
EXPORT_SYMBOL(dma_free_noncoherent);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));
EXPORT_SYMBOL(dma_free_coherent);
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
return __pa(ptr);
}
EXPORT_SYMBOL(dma_map_single);
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_single);
int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
sg->dma_address = (dma_addr_t)page_to_phys(sg->page) + sg->offset;
}
return nents;
}
EXPORT_SYMBOL(dma_map_sg);
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
return page_to_phys(page) + offset;
}
EXPORT_SYMBOL(dma_map_page);
void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_page);
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_sg);
void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_for_cpu);
void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_for_device);
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_range_for_device);
void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_sg_for_cpu);
void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_sg_for_device);
int dma_mapping_error(dma_addr_t dma_addr)
{
return 0;
}
EXPORT_SYMBOL(dma_mapping_error);
int dma_supported(struct device *dev, u64 mask)
{
/*
* we fall back to GFP_DMA when the mask isn't all 1s,
* so we can't guarantee allocations that must be
* within a tighter range than GFP_DMA..
*/
if (mask < 0x00ffffff)
return 0;
return 1;
}
EXPORT_SYMBOL(dma_supported);
int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
{
return 1;
}
EXPORT_SYMBOL(dma_is_consistent);