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-rw-r--r--arch/openrisc/kernel/Makefile6
-rw-r--r--arch/openrisc/kernel/asm-offsets.c6
-rw-r--r--arch/openrisc/kernel/dma.c109
-rw-r--r--arch/openrisc/kernel/entry.S156
-rw-r--r--arch/openrisc/kernel/head.S30
-rw-r--r--arch/openrisc/kernel/idle.c79
-rw-r--r--arch/openrisc/kernel/init_task.c42
-rw-r--r--arch/openrisc/kernel/irq.c103
-rw-r--r--arch/openrisc/kernel/module.c6
-rw-r--r--arch/openrisc/kernel/process.c166
-rw-r--r--arch/openrisc/kernel/prom.c77
-rw-r--r--arch/openrisc/kernel/ptrace.c5
-rw-r--r--arch/openrisc/kernel/setup.c38
-rw-r--r--arch/openrisc/kernel/signal.c289
-rw-r--r--arch/openrisc/kernel/sys_or32.c57
-rw-r--r--arch/openrisc/kernel/time.c13
-rw-r--r--arch/openrisc/kernel/traps.c19
-rw-r--r--arch/openrisc/kernel/vmlinux.h4
18 files changed, 448 insertions, 757 deletions
diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile
index 9a4c2706d79..ec6d9d37cef 100644
--- a/arch/openrisc/kernel/Makefile
+++ b/arch/openrisc/kernel/Makefile
@@ -2,10 +2,10 @@
# Makefile for the linux kernel.
#
-extra-y := head.o vmlinux.lds init_task.o
+extra-y := head.o vmlinux.lds
-obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \
- traps.o time.o irq.o entry.o ptrace.o signal.o sys_or32.o \
+obj-y := setup.o or32_ksyms.o process.o dma.o \
+ traps.o time.o irq.o entry.o ptrace.o signal.o \
sys_call_table.o
obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/openrisc/kernel/asm-offsets.c b/arch/openrisc/kernel/asm-offsets.c
index 1a242a0d758..ddb73685586 100644
--- a/arch/openrisc/kernel/asm-offsets.c
+++ b/arch/openrisc/kernel/asm-offsets.c
@@ -34,15 +34,11 @@
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/thread_info.h>
+#include <linux/kbuild.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
-#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
int main(void)
{
/* offsets into the task_struct */
diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c
index f1c8ee2895d..0b77ddb1ee0 100644
--- a/arch/openrisc/kernel/dma.c
+++ b/arch/openrisc/kernel/dma.c
@@ -21,13 +21,16 @@
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
+#include <linux/export.h>
+#include <linux/dma-attrs.h>
#include <asm/cpuinfo.h>
#include <asm/spr_defs.h>
#include <asm/tlbflush.h>
-static int page_set_nocache(pte_t *pte, unsigned long addr,
- unsigned long next, struct mm_walk *walk)
+static int
+page_set_nocache(pte_t *pte, unsigned long addr,
+ unsigned long next, struct mm_walk *walk)
{
unsigned long cl;
@@ -46,8 +49,9 @@ static int page_set_nocache(pte_t *pte, unsigned long addr,
return 0;
}
-static int page_clear_nocache(pte_t *pte, unsigned long addr,
- unsigned long next, struct mm_walk *walk)
+static int
+page_clear_nocache(pte_t *pte, unsigned long addr,
+ unsigned long next, struct mm_walk *walk)
{
pte_val(*pte) &= ~_PAGE_CI;
@@ -67,9 +71,19 @@ static int page_clear_nocache(pte_t *pte, unsigned long addr,
* cache-inhibit bit on those pages, and makes sure that the pages are
* flushed out of the cache before they are used.
*
+ * If the NON_CONSISTENT attribute is set, then this function just
+ * returns "normal", cachable memory.
+ *
+ * There are additional flags WEAK_ORDERING and WRITE_COMBINE to take
+ * into consideration here, too. All current known implementations of
+ * the OR1K support only strongly ordered memory accesses, so that flag
+ * is being ignored for now; uncached but write-combined memory is a
+ * missing feature of the OR1K.
*/
-void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp)
+static void *
+or1k_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs)
{
unsigned long va;
void *page;
@@ -87,20 +101,23 @@ void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
va = (unsigned long)page;
- /*
- * We need to iterate through the pages, clearing the dcache for
- * them and setting the cache-inhibit bit.
- */
- if (walk_page_range(va, va + size, &walk)) {
- free_pages_exact(page, size);
- return NULL;
+ if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
+ /*
+ * We need to iterate through the pages, clearing the dcache for
+ * them and setting the cache-inhibit bit.
+ */
+ if (walk_page_range(va, va + size, &walk)) {
+ free_pages_exact(page, size);
+ return NULL;
+ }
}
return (void *)va;
}
-void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle)
+static void
+or1k_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, struct dma_attrs *attrs)
{
unsigned long va = (unsigned long)vaddr;
struct mm_walk walk = {
@@ -108,16 +125,19 @@ void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
.mm = &init_mm
};
- /* walk_page_range shouldn't be able to fail here */
- WARN_ON(walk_page_range(va, va + size, &walk));
+ if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
+ /* walk_page_range shouldn't be able to fail here */
+ WARN_ON(walk_page_range(va, va + size, &walk));
+ }
free_pages_exact(vaddr, size);
}
-dma_addr_t or1k_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static dma_addr_t
+or1k_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
unsigned long cl;
dma_addr_t addr = page_to_phys(page) + offset;
@@ -147,16 +167,18 @@ dma_addr_t or1k_map_page(struct device *dev, struct page *page,
return addr;
}
-void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static void
+or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
/* Nothing special to do here... */
}
-int or1k_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static int
+or1k_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@@ -169,9 +191,10 @@ int or1k_map_sg(struct device *dev, struct scatterlist *sg,
return nents;
}
-void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static void
+or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@@ -181,9 +204,10 @@ void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
}
}
-void or1k_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+static void
+or1k_sync_single_for_cpu(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
{
unsigned long cl;
dma_addr_t addr = dma_handle;
@@ -193,9 +217,10 @@ void or1k_sync_single_for_cpu(struct device *dev,
mtspr(SPR_DCBIR, cl);
}
-void or1k_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+static void
+or1k_sync_single_for_device(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
{
unsigned long cl;
dma_addr_t addr = dma_handle;
@@ -205,6 +230,18 @@ void or1k_sync_single_for_device(struct device *dev,
mtspr(SPR_DCBFR, cl);
}
+struct dma_map_ops or1k_dma_map_ops = {
+ .alloc = or1k_dma_alloc,
+ .free = or1k_dma_free,
+ .map_page = or1k_map_page,
+ .unmap_page = or1k_unmap_page,
+ .map_sg = or1k_map_sg,
+ .unmap_sg = or1k_unmap_sg,
+ .sync_single_for_cpu = or1k_sync_single_for_cpu,
+ .sync_single_for_device = or1k_sync_single_for_device,
+};
+EXPORT_SYMBOL(or1k_dma_map_ops);
+
/* Number of entries preallocated for DMA-API debugging */
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S
index d5f9c35a583..fec8bf97d80 100644
--- a/arch/openrisc/kernel/entry.S
+++ b/arch/openrisc/kernel/entry.S
@@ -95,7 +95,6 @@ handler: ;\
/* r1, EPCR, ESR a already saved */ ;\
l.sw PT_GPR2(r1),r2 ;\
l.sw PT_GPR3(r1),r3 ;\
- l.sw PT_ORIG_GPR11(r1),r11 ;\
/* r4 already save */ ;\
l.sw PT_GPR5(r1),r5 ;\
l.sw PT_GPR6(r1),r6 ;\
@@ -125,7 +124,9 @@ handler: ;\
/* r30 already save */ ;\
/* l.sw PT_GPR30(r1),r30*/ ;\
l.sw PT_GPR31(r1),r31 ;\
- l.sw PT_SYSCALLNO(r1),r0
+ /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\
+ l.addi r30,r0,-1 ;\
+ l.sw PT_ORIG_GPR11(r1),r30
#define UNHANDLED_EXCEPTION(handler,vector) \
.global handler ;\
@@ -133,7 +134,6 @@ handler: ;\
/* r1, EPCR, ESR already saved */ ;\
l.sw PT_GPR2(r1),r2 ;\
l.sw PT_GPR3(r1),r3 ;\
- l.sw PT_ORIG_GPR11(r1),r11 ;\
l.sw PT_GPR5(r1),r5 ;\
l.sw PT_GPR6(r1),r6 ;\
l.sw PT_GPR7(r1),r7 ;\
@@ -162,7 +162,9 @@ handler: ;\
/* r31 already saved */ ;\
l.sw PT_GPR30(r1),r30 ;\
/* l.sw PT_GPR31(r1),r31 */ ;\
- l.sw PT_SYSCALLNO(r1),r0 ;\
+ /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\
+ l.addi r30,r0,-1 ;\
+ l.sw PT_ORIG_GPR11(r1),r30 ;\
l.addi r3,r1,0 ;\
/* r4 is exception EA */ ;\
l.addi r5,r0,vector ;\
@@ -199,12 +201,17 @@ EXCEPTION_ENTRY(_bus_fault_handler)
l.nop
/* ---[ 0x300: Data Page Fault exception ]------------------------------- */
+EXCEPTION_ENTRY(_dtlb_miss_page_fault_handler)
+ l.and r5,r5,r0
+ l.j 1f
+ l.nop
EXCEPTION_ENTRY(_data_page_fault_handler)
/* set up parameters for do_page_fault */
+ l.ori r5,r0,0x300 // exception vector
+1:
l.addi r3,r1,0 // pt_regs
/* r4 set be EXCEPTION_HANDLE */ // effective address of fault
- l.ori r5,r0,0x300 // exception vector
/*
* __PHX__: TODO
@@ -274,12 +281,17 @@ EXCEPTION_ENTRY(_data_page_fault_handler)
l.nop
/* ---[ 0x400: Insn Page Fault exception ]------------------------------- */
+EXCEPTION_ENTRY(_itlb_miss_page_fault_handler)
+ l.and r5,r5,r0
+ l.j 1f
+ l.nop
EXCEPTION_ENTRY(_insn_page_fault_handler)
/* set up parameters for do_page_fault */
+ l.ori r5,r0,0x400 // exception vector
+1:
l.addi r3,r1,0 // pt_regs
/* r4 set be EXCEPTION_HANDLE */ // effective address of fault
- l.ori r5,r0,0x400 // exception vector
l.ori r6,r0,0x0 // !write access
/* call fault.c handler in or32/mm/fault.c */
@@ -554,6 +566,7 @@ ENTRY(_sys_call_handler)
l.sw PT_GPR9(r1),r9
/* r10 already saved */
l.sw PT_GPR11(r1),r11
+ /* orig_gpr11 must be set for syscalls */
l.sw PT_ORIG_GPR11(r1),r11
/* r12,r13 already saved */
@@ -567,9 +580,6 @@ ENTRY(_sys_call_handler)
/* r30 is the only register we clobber in the fast path */
/* r30 already saved */
/* l.sw PT_GPR30(r1),r30 */
- /* This is used by do_signal to determine whether to check for
- * syscall restart or not */
- l.sw PT_SYSCALLNO(r1),r11
_syscall_check_trace_enter:
/* If TIF_SYSCALL_TRACE is set, then we want to do syscall tracing */
@@ -731,7 +741,7 @@ _syscall_trace_enter:
* so that we can do the syscall for real and return to the syscall
* hot path.
*/
- l.lwz r11,PT_SYSCALLNO(r1)
+ l.lwz r11,PT_GPR11(r1)
l.lwz r3,PT_GPR3(r1)
l.lwz r4,PT_GPR4(r1)
l.lwz r5,PT_GPR5(r1)
@@ -843,37 +853,44 @@ UNHANDLED_EXCEPTION(_vector_0x1f00,0x1f00)
/* ========================================================[ return ] === */
+_resume_userspace:
+ DISABLE_INTERRUPTS(r3,r4)
+ l.lwz r4,TI_FLAGS(r10)
+ l.andi r13,r4,_TIF_WORK_MASK
+ l.sfeqi r13,0
+ l.bf _restore_all
+ l.nop
+
_work_pending:
- /*
- * if (current_thread_info->flags & _TIF_NEED_RESCHED)
- * schedule();
- */
- l.lwz r5,TI_FLAGS(r10)
- l.andi r3,r5,_TIF_NEED_RESCHED
- l.sfnei r3,0
- l.bnf _work_notifysig
+ l.lwz r5,PT_ORIG_GPR11(r1)
+ l.sfltsi r5,0
+ l.bnf 1f
l.nop
- l.jal schedule
+ l.andi r5,r5,0
+1:
+ l.jal do_work_pending
+ l.ori r3,r1,0 /* pt_regs */
+
+ l.sfeqi r11,0
+ l.bf _restore_all
l.nop
- l.j _resume_userspace
+ l.sfltsi r11,0
+ l.bnf 1f
l.nop
-
-/* Handle pending signals and notify-resume requests.
- * do_notify_resume must be passed the latest pushed pt_regs, not
- * necessarily the "userspace" ones. Also, pt_regs->syscallno
- * must be set so that the syscall restart functionality works.
- */
-_work_notifysig:
- l.jal do_notify_resume
- l.ori r3,r1,0 /* pt_regs */
-
-_resume_userspace:
- DISABLE_INTERRUPTS(r3,r4)
- l.lwz r3,TI_FLAGS(r10)
- l.andi r3,r3,_TIF_WORK_MASK
- l.sfnei r3,0
- l.bf _work_pending
+ l.and r11,r11,r0
+ l.ori r11,r11,__NR_restart_syscall
+ l.j _syscall_check_trace_enter
l.nop
+1:
+ l.lwz r11,PT_ORIG_GPR11(r1)
+ /* Restore arg registers */
+ l.lwz r3,PT_GPR3(r1)
+ l.lwz r4,PT_GPR4(r1)
+ l.lwz r5,PT_GPR5(r1)
+ l.lwz r6,PT_GPR6(r1)
+ l.lwz r7,PT_GPR7(r1)
+ l.j _syscall_check_trace_enter
+ l.lwz r8,PT_GPR8(r1)
_restore_all:
RESTORE_ALL
@@ -894,6 +911,16 @@ ENTRY(ret_from_fork)
l.jal schedule_tail
l.nop
+ /* Check if we are a kernel thread */
+ l.sfeqi r20,0
+ l.bf 1f
+ l.nop
+
+ /* ...we are a kernel thread so invoke the requested callback */
+ l.jalr r20
+ l.or r3,r22,r0
+
+1:
/* _syscall_returns expect r11 to contain return value */
l.lwz r11,PT_GPR11(r1)
@@ -915,26 +942,6 @@ ENTRY(ret_from_fork)
l.j _syscall_return
l.nop
-/* Since syscalls don't save call-clobbered registers, the args to
- * kernel_thread_helper will need to be passed through callee-saved
- * registers and copied to the parameter registers when the thread
- * begins running.
- *
- * See arch/openrisc/kernel/process.c:
- * The args are passed as follows:
- * arg1 (r3) : passed in r20
- * arg2 (r4) : passed in r22
- */
-
-ENTRY(_kernel_thread_helper)
- l.or r3,r20,r0
- l.or r4,r22,r0
- l.movhi r31,hi(kernel_thread_helper)
- l.ori r31,r31,lo(kernel_thread_helper)
- l.jr r31
- l.nop
-
-
/* ========================================================[ switch ] === */
/*
@@ -1044,8 +1051,13 @@ ENTRY(_switch)
/* Unwind stack to pre-switch state */
l.addi r1,r1,(INT_FRAME_SIZE)
- /* Return via the link-register back to where we 'came from', where that can be
- * either schedule() or return_from_fork()... */
+ /* Return via the link-register back to where we 'came from', where
+ * that may be either schedule(), ret_from_fork(), or
+ * ret_from_kernel_thread(). If we are returning to a new thread,
+ * we are expected to have set up the arg to schedule_tail already,
+ * hence we do so here unconditionally:
+ */
+ l.lwz r3,TI_TASK(r3) /* Load 'prev' as schedule_tail arg */
l.jr r9
l.nop
@@ -1076,26 +1088,18 @@ _fork_save_extra_regs_and_call:
l.jr r29
l.sw PT_GPR28(r1),r28
-ENTRY(sys_clone)
- l.movhi r29,hi(_sys_clone)
- l.ori r29,r29,lo(_sys_clone)
+ENTRY(__sys_clone)
+ l.movhi r29,hi(sys_clone)
+ l.ori r29,r29,lo(sys_clone)
l.j _fork_save_extra_regs_and_call
l.addi r7,r1,0
-ENTRY(sys_fork)
- l.movhi r29,hi(_sys_fork)
- l.ori r29,r29,lo(_sys_fork)
+ENTRY(__sys_fork)
+ l.movhi r29,hi(sys_fork)
+ l.ori r29,r29,lo(sys_fork)
l.j _fork_save_extra_regs_and_call
l.addi r3,r1,0
-ENTRY(sys_execve)
- l.j _sys_execve
- l.addi r6,r1,0
-
-ENTRY(sys_sigaltstack)
- l.j _sys_sigaltstack
- l.addi r5,r1,0
-
ENTRY(sys_rt_sigreturn)
l.j _sys_rt_sigreturn
l.addi r3,r1,0
@@ -1117,10 +1121,10 @@ ENTRY(sys_rt_sigreturn)
ENTRY(sys_or1k_atomic)
/* FIXME: This ignores r3 and always does an XCHG */
DISABLE_INTERRUPTS(r17,r19)
- l.lwz r30,0(r4)
- l.lwz r28,0(r5)
- l.sw 0(r4),r28
- l.sw 0(r5),r30
+ l.lwz r29,0(r4)
+ l.lwz r27,0(r5)
+ l.sw 0(r4),r27
+ l.sw 0(r5),r29
ENABLE_INTERRUPTS(r17)
l.jr r9
l.or r11,r0,r0
diff --git a/arch/openrisc/kernel/head.S b/arch/openrisc/kernel/head.S
index c75018d2264..1d3c9c28ac2 100644
--- a/arch/openrisc/kernel/head.S
+++ b/arch/openrisc/kernel/head.S
@@ -19,6 +19,7 @@
#include <linux/threads.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/serial_reg.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/mmu.h>
@@ -26,6 +27,7 @@
#include <asm/cache.h>
#include <asm/spr_defs.h>
#include <asm/asm-offsets.h>
+#include <linux/of_fdt.h>
#define tophys(rd,rs) \
l.movhi rd,hi(-KERNELBASE) ;\
@@ -290,9 +292,9 @@
/* Jump to .init code at _start which lives in the .head section
* and will be discarded after boot.
*/
- LOAD_SYMBOL_2_GPR(r4, _start)
- tophys (r3,r4) /* MMU disabled */
- l.jr r3
+ LOAD_SYMBOL_2_GPR(r15, _start)
+ tophys (r13,r15) /* MMU disabled */
+ l.jr r13
l.nop
/* ---[ 0x200: BUS exception ]------------------------------------------- */
@@ -440,6 +442,9 @@ _dispatch_do_ipage_fault:
__HEAD
.global _start
_start:
+ /* save kernel parameters */
+ l.or r25,r0,r3 /* pointer to fdt */
+
/*
* ensure a deterministic start
*/
@@ -471,7 +476,6 @@ _start:
CLEAR_GPR(r22)
CLEAR_GPR(r23)
CLEAR_GPR(r24)
- CLEAR_GPR(r25)
CLEAR_GPR(r26)
CLEAR_GPR(r27)
CLEAR_GPR(r28)
@@ -565,6 +569,18 @@ enable_mmu:
// reset the simulation counters
l.nop 5
+ /* check fdt header magic word */
+ l.lwz r3,0(r25) /* load magic from fdt into r3 */
+ l.movhi r4,hi(OF_DT_HEADER)
+ l.ori r4,r4,lo(OF_DT_HEADER)
+ l.sfeq r3,r4
+ l.bf _fdt_found
+ l.nop
+ /* magic number mismatch, set fdt pointer to null */
+ l.or r25,r0,r0
+_fdt_found:
+ /* pass fdt pointer to or32_early_setup in r3 */
+ l.or r3,r0,r25
LOAD_SYMBOL_2_GPR(r24, or32_early_setup)
l.jalr r24
l.nop
@@ -1054,8 +1070,7 @@ d_pte_not_present:
EXCEPTION_LOAD_GPR4
EXCEPTION_LOAD_GPR5
EXCEPTION_LOAD_GPR6
- l.j _dispatch_do_dpage_fault
- l.nop
+ EXCEPTION_HANDLE(_dtlb_miss_page_fault_handler)
/* ==============================================[ ITLB miss handler ]=== */
ENTRY(itlb_miss_handler)
@@ -1177,8 +1192,7 @@ i_pte_not_present:
EXCEPTION_LOAD_GPR4
EXCEPTION_LOAD_GPR5
EXCEPTION_LOAD_GPR6
- l.j _dispatch_do_ipage_fault
- l.nop
+ EXCEPTION_HANDLE(_itlb_miss_page_fault_handler)
/* ==============================================[ boot tlb handlers ]=== */
diff --git a/arch/openrisc/kernel/idle.c b/arch/openrisc/kernel/idle.c
deleted file mode 100644
index e5fc7887783..00000000000
--- a/arch/openrisc/kernel/idle.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * OpenRISC idle.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * 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.
- *
- * Idle daemon for or32. Idle daemon will handle any action
- * that needs to be taken when the system becomes idle.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/tick.h>
-
-#include <asm/pgtable.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/cache.h>
-#include <asm/pgalloc.h>
-
-void (*powersave) (void) = NULL;
-
-static inline void pm_idle(void)
-{
- barrier();
-}
-
-void cpu_idle(void)
-{
- set_thread_flag(TIF_POLLING_NRFLAG);
-
- /* endless idle loop with no priority at all */
- while (1) {
- tick_nohz_idle_enter();
- rcu_idle_enter();
-
- while (!need_resched()) {
- check_pgt_cache();
- rmb();
-
- clear_thread_flag(TIF_POLLING_NRFLAG);
-
- local_irq_disable();
- /* Don't trace irqs off for idle */
- stop_critical_timings();
- if (!need_resched() && powersave != NULL)
- powersave();
- start_critical_timings();
- local_irq_enable();
- set_thread_flag(TIF_POLLING_NRFLAG);
- }
-
- rcu_idle_exit();
- tick_nohz_idle_exit();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
-}
diff --git a/arch/openrisc/kernel/init_task.c b/arch/openrisc/kernel/init_task.c
deleted file mode 100644
index ca534082d5f..00000000000
--- a/arch/openrisc/kernel/init_task.c
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * OpenRISC init_task.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * 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.
- */
-
-#include <linux/init_task.h>
-#include <linux/mqueue.h>
-#include <linux/export.h>
-
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-
-/*
- * Initial thread structure.
- *
- * We need to make sure that this is THREAD_SIZE aligned due to the
- * way process stacks are handled. This is done by having a special
- * "init_task" linker map entry..
- */
-union thread_union init_thread_union __init_task_data = {
- INIT_THREAD_INFO(init_task)
-};
-
-/*
- * Initial task structure.
- *
- * All other task structs will be allocated on slabs in fork.c
- */
-struct task_struct init_task = INIT_TASK(init_task);
-EXPORT_SYMBOL(init_task);
diff --git a/arch/openrisc/kernel/irq.c b/arch/openrisc/kernel/irq.c
index 4bfead22095..8ec77bc9f1e 100644
--- a/arch/openrisc/kernel/irq.c
+++ b/arch/openrisc/kernel/irq.c
@@ -14,17 +14,13 @@
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/ptrace.h>
-#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/ftrace.h>
#include <linux/irq.h>
-#include <linux/seq_file.h>
-#include <linux/kernel_stat.h>
#include <linux/export.h>
-
+#include <linux/irqdomain.h>
#include <linux/irqflags.h>
/* read interrupt enabled status */
@@ -50,19 +46,19 @@ EXPORT_SYMBOL(arch_local_irq_restore);
static void or1k_pic_mask(struct irq_data *data)
{
- mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->irq));
+ mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
}
static void or1k_pic_unmask(struct irq_data *data)
{
- mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->irq));
+ mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->hwirq));
}
static void or1k_pic_ack(struct irq_data *data)
{
/* EDGE-triggered interrupts need to be ack'ed in order to clear
* the latch.
- * LEVER-triggered interrupts do not need to be ack'ed; however,
+ * LEVEL-triggered interrupts do not need to be ack'ed; however,
* ack'ing the interrupt has no ill-effect and is quicker than
* trying to figure out what type it is...
*/
@@ -79,10 +75,10 @@ static void or1k_pic_ack(struct irq_data *data)
* as opposed to a 1 as mandated by the spec
*/
- mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->irq));
+ mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
#else
- WARN(1, "Interrupt handling possibily broken\n");
- mtspr(SPR_PICSR, (1UL << irq));
+ WARN(1, "Interrupt handling possibly broken\n");
+ mtspr(SPR_PICSR, (1UL << data->hwirq));
#endif
}
@@ -91,13 +87,16 @@ static void or1k_pic_mask_ack(struct irq_data *data)
/* Comments for pic_ack apply here, too */
#ifdef CONFIG_OR1K_1200
- mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->irq));
+ mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
+ mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
#else
- WARN(1, "Interrupt handling possibily broken\n");
- mtspr(SPR_PICSR, (1UL << irq));
+ WARN(1, "Interrupt handling possibly broken\n");
+ mtspr(SPR_PICMR, (1UL << data->hwirq));
+ mtspr(SPR_PICSR, (1UL << data->hwirq));
#endif
}
+#if 0
static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type)
{
/* There's nothing to do in the PIC configuration when changing
@@ -107,43 +106,64 @@ static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type)
return irq_setup_alt_chip(data, flow_type);
}
+#endif
+
+static struct irq_chip or1k_dev = {
+ .name = "or1k-PIC",
+ .irq_unmask = or1k_pic_unmask,
+ .irq_mask = or1k_pic_mask,
+ .irq_ack = or1k_pic_ack,
+ .irq_mask_ack = or1k_pic_mask_ack,
+};
+
+static struct irq_domain *root_domain;
static inline int pic_get_irq(int first)
{
- int irq;
+ int hwirq;
- irq = ffs(mfspr(SPR_PICSR) >> first);
+ hwirq = ffs(mfspr(SPR_PICSR) >> first);
+ if (!hwirq)
+ return NO_IRQ;
+ else
+ hwirq = hwirq + first -1;
- return irq ? irq + first - 1 : NO_IRQ;
+ return irq_find_mapping(root_domain, hwirq);
}
-static void __init or1k_irq_init(void)
+
+static int or1k_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
{
- struct irq_chip_generic *gc;
- struct irq_chip_type *ct;
+ irq_set_chip_and_handler_name(irq, &or1k_dev,
+ handle_level_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL | IRQ_NOPROBE);
- /* Disable all interrupts until explicitly requested */
- mtspr(SPR_PICMR, (0UL));
+ return 0;
+}
- gc = irq_alloc_generic_chip("or1k-PIC", 1, 0, 0, handle_level_irq);
- ct = gc->chip_types;
+static const struct irq_domain_ops or1k_irq_domain_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = or1k_map,
+};
- ct->chip.irq_unmask = or1k_pic_unmask;
- ct->chip.irq_mask = or1k_pic_mask;
- ct->chip.irq_ack = or1k_pic_ack;
- ct->chip.irq_mask_ack = or1k_pic_mask_ack;
- ct->chip.irq_set_type = or1k_pic_set_type;
+/*
+ * This sets up the IRQ domain for the PIC built in to the OpenRISC
+ * 1000 CPU. This is the "root" domain as these are the interrupts
+ * that directly trigger an exception in the CPU.
+ */
+static void __init or1k_irq_init(void)
+{
+ struct device_node *intc = NULL;
- /* The OR1K PIC can handle both level and edge trigged
- * interrupts in roughly the same manner
- */
-#if 0
- /* FIXME: chip.type??? */
- ct->chip.type = IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_MASK;
-#endif
+ /* The interrupt controller device node is mandatory */
+ intc = of_find_compatible_node(NULL, NULL, "opencores,or1k-pic");
+ BUG_ON(!intc);
- irq_setup_generic_chip(gc, IRQ_MSK(NR_IRQS), 0,
- IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
+ /* Disable all interrupts until explicitly requested */
+ mtspr(SPR_PICMR, (0UL));
+
+ root_domain = irq_domain_add_linear(intc, 32,
+ &or1k_irq_domain_ops, NULL);
}
void __init init_IRQ(void)
@@ -164,10 +184,3 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
irq_exit();
set_irq_regs(old_regs);
}
-
-unsigned int irq_create_of_mapping(struct device_node *controller,
- const u32 *intspec, unsigned int intsize)
-{
- return intspec[0];
-}
-EXPORT_SYMBOL_GPL(irq_create_of_mapping);
diff --git a/arch/openrisc/kernel/module.c b/arch/openrisc/kernel/module.c
index 10ff50f0202..ef872ae4c87 100644
--- a/arch/openrisc/kernel/module.c
+++ b/arch/openrisc/kernel/module.c
@@ -47,12 +47,10 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
*location = value;
break;
case R_OR32_CONST:
- location = (uint16_t *)location + 1;
- *((uint16_t *)location) = (uint16_t) (value);
+ *((uint16_t *)location + 1) = value;
break;
case R_OR32_CONSTH:
- location = (uint16_t *)location + 1;
- *((uint16_t *)location) = (uint16_t) (value >> 16);
+ *((uint16_t *)location + 1) = value >> 16;
break;
case R_OR32_JUMPTARG:
value -= (uint32_t)location;
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index e4209af879e..386af258591 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -38,7 +38,6 @@
#include <asm/uaccess.h>
#include <asm/pgtable.h>
-#include <asm/system.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/spr_defs.h>
@@ -91,6 +90,7 @@ void show_regs(struct pt_regs *regs)
{
extern void show_registers(struct pt_regs *regs);
+ show_regs_print_info(KERN_DEFAULT);
/* __PHX__ cleanup this mess */
show_registers(regs);
}
@@ -110,66 +110,83 @@ void release_thread(struct task_struct *dead_task)
*/
extern asmlinkage void ret_from_fork(void);
+/*
+ * copy_thread
+ * @clone_flags: flags
+ * @usp: user stack pointer or fn for kernel thread
+ * @arg: arg to fn for kernel thread; always NULL for userspace thread
+ * @p: the newly created task
+ * @regs: CPU context to copy for userspace thread; always NULL for kthread
+ *
+ * At the top of a newly initialized kernel stack are two stacked pt_reg
+ * structures. The first (topmost) is the userspace context of the thread.
+ * The second is the kernelspace context of the thread.
+ *
+ * A kernel thread will not be returning to userspace, so the topmost pt_regs
+ * struct can be uninitialized; it _does_ need to exist, though, because
+ * a kernel thread can become a userspace thread by doing a kernel_execve, in
+ * which case the topmost context will be initialized and used for 'returning'
+ * to userspace.
+ *
+ * The second pt_reg struct needs to be initialized to 'return' to
+ * ret_from_fork. A kernel thread will need to set r20 to the address of
+ * a function to call into (with arg in r22); userspace threads need to set
+ * r20 to NULL in which case ret_from_fork will just continue a return to
+ * userspace.
+ *
+ * A kernel thread 'fn' may return; this is effectively what happens when
+ * kernel_execve is called. In that case, the userspace pt_regs must have
+ * been initialized (which kernel_execve takes care of, see start_thread
+ * below); ret_from_fork will then continue its execution causing the
+ * 'kernel thread' to return to userspace as a userspace thread.
+ */
+
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs *childregs;
+ struct pt_regs *userregs;
struct pt_regs *kregs;
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- struct thread_info *ti;
unsigned long top_of_kernel_stack;
top_of_kernel_stack = sp;
p->set_child_tid = p->clear_child_tid = NULL;
- /* Copy registers */
- /* redzone */
- sp -= STACK_FRAME_OVERHEAD;
+ /* Locate userspace context on stack... */
+ sp -= STACK_FRAME_OVERHEAD; /* redzone */
sp -= sizeof(struct pt_regs);
- childregs = (struct pt_regs *)sp;
+ userregs = (struct pt_regs *) sp;
- /* Copy parent registers */
- *childregs = *regs;
+ /* ...and kernel context */
+ sp -= STACK_FRAME_OVERHEAD; /* redzone */
+ sp -= sizeof(struct pt_regs);
+ kregs = (struct pt_regs *)sp;
- if ((childregs->sr & SPR_SR_SM) == 1) {
- /* for kernel thread, set `current_thread_info'
- * and stackptr in new task
- */
- childregs->sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- childregs->gpr[10] = (unsigned long)task_thread_info(p);
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(kregs, 0, sizeof(struct pt_regs));
+ kregs->gpr[20] = usp; /* fn, kernel thread */
+ kregs->gpr[22] = arg;
} else {
- childregs->sp = usp;
- }
-
- childregs->gpr[11] = 0; /* Result from fork() */
+ *userregs = *current_pt_regs();
- /*
- * The way this works is that at some point in the future
- * some task will call _switch to switch to the new task.
- * That will pop off the stack frame created below and start
- * the new task running at ret_from_fork. The new task will
- * do some house keeping and then return from the fork or clone
- * system call, using the stack frame created above.
- */
- /* redzone */
- sp -= STACK_FRAME_OVERHEAD;
- sp -= sizeof(struct pt_regs);
- kregs = (struct pt_regs *)sp;
+ if (usp)
+ userregs->sp = usp;
+ userregs->gpr[11] = 0; /* Result from fork() */
- ti = task_thread_info(p);
- ti->ksp = sp;
+ kregs->gpr[20] = 0; /* Userspace thread */
+ }
- /* kregs->sp must store the location of the 'pre-switch' kernel stack
- * pointer... for a newly forked process, this is simply the top of
- * the kernel stack.
+ /*
+ * _switch wants the kernel stack page in pt_regs->sp so that it
+ * can restore it to thread_info->ksp... see _switch for details.
*/
kregs->sp = top_of_kernel_stack;
- kregs->gpr[3] = (unsigned long)current; /* arg to schedule_tail */
- kregs->gpr[10] = (unsigned long)task_thread_info(p);
kregs->gpr[9] = (unsigned long)ret_from_fork;
+ task_thread_info(p)->ksp = (unsigned long)kregs;
+
return 0;
}
@@ -178,16 +195,14 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
*/
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
{
- unsigned long sr = regs->sr & ~SPR_SR_SM;
+ unsigned long sr = mfspr(SPR_SR) & ~SPR_SR_SM;
set_fs(USER_DS);
- memset(regs->gpr, 0, sizeof(regs->gpr));
+ memset(regs, 0, sizeof(struct pt_regs));
regs->pc = pc;
regs->sr = sr;
regs->sp = sp;
-
-/* printk("start thread, ksp = %lx\n", current_thread_info()->ksp);*/
}
/* Fill in the fpu structure for a core dump. */
@@ -238,74 +253,9 @@ void dump_elf_thread(elf_greg_t *dest, struct pt_regs* regs)
dest[35] = 0;
}
-extern void _kernel_thread_helper(void);
-
-void __noreturn kernel_thread_helper(int (*fn) (void *), void *arg)
-{
- do_exit(fn(arg));
-}
-
-/*
- * Create a kernel thread.
- */
-int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.gpr[20] = (unsigned long)fn;
- regs.gpr[22] = (unsigned long)arg;
- regs.sr = mfspr(SPR_SR);
- regs.pc = (unsigned long)_kernel_thread_helper;
-
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED,
- 0, &regs, 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage long _sys_execve(const char __user *name,
- const char __user * const __user *argv,
- const char __user * const __user *envp,
- struct pt_regs *regs)
-{
- int error;
- char *filename;
-
- filename = getname(name);
- error = PTR_ERR(filename);
-
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename, argv, envp, regs);
- putname(filename);
-
-out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
/* TODO */
return 0;
}
-
-int kernel_execve(const char *filename, char *const argv[], char *const envp[])
-{
- register long __res asm("r11") = __NR_execve;
- register long __a asm("r3") = (long)(filename);
- register long __b asm("r4") = (long)(argv);
- register long __c asm("r5") = (long)(envp);
- __asm__ volatile ("l.sys 1"
- : "=r" (__res), "=r"(__a), "=r"(__b), "=r"(__c)
- : "0"(__res), "1"(__a), "2"(__b), "3"(__c)
- : "r6", "r7", "r8", "r12", "r13", "r15",
- "r17", "r19", "r21", "r23", "r25", "r27",
- "r29", "r31");
- __asm__ volatile ("l.nop");
- return __res;
-}
diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c
index 3d4478f6c94..6a44340d1b1 100644
--- a/arch/openrisc/kernel/prom.c
+++ b/arch/openrisc/kernel/prom.c
@@ -18,90 +18,15 @@
*
*/
-#include <stdarg.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
#include <linux/init.h>
-#include <linux/threads.h>
-#include <linux/spinlock.h>
#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/stringify.h>
-#include <linux/delay.h>
-#include <linux/initrd.h>
-#include <linux/bitops.h>
-#include <linux/module.h>
-#include <linux/kexec.h>
-#include <linux/debugfs.h>
-#include <linux/irq.h>
#include <linux/memblock.h>
#include <linux/of_fdt.h>
-#include <asm/prom.h>
#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/irq.h>
-#include <linux/io.h>
-#include <asm/system.h>
-#include <asm/mmu.h>
-#include <asm/pgtable.h>
-#include <asm/sections.h>
-#include <asm/setup.h>
-
-extern char cmd_line[COMMAND_LINE_SIZE];
-
-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
- size &= PAGE_MASK;
- memblock_add(base, size);
-}
-
-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
- return __va(memblock_alloc(size, align));
-}
void __init early_init_devtree(void *params)
{
- void *alloc;
-
- /* Setup flat device-tree pointer */
- initial_boot_params = params;
-
-
- /* Retrieve various informations from the /chosen node of the
- * device-tree, including the platform type, initrd location and
- * size, TCE reserve, and more ...
- */
- of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line);
-
- /* Scan memory nodes and rebuild MEMBLOCKs */
- of_scan_flat_dt(early_init_dt_scan_root, NULL);
- of_scan_flat_dt(early_init_dt_scan_memory, NULL);
-
- /* Save command line for /proc/cmdline and then parse parameters */
- strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
-
+ early_init_dt_scan(params);
memblock_allow_resize();
-
- /* We must copy the flattend device tree from init memory to regular
- * memory because the device tree references the strings in it
- * directly.
- */
-
- alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE));
-
- memcpy(alloc, initial_boot_params, initial_boot_params->totalsize);
-
- initial_boot_params = alloc;
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
- unsigned long end)
-{
- initrd_start = (unsigned long)__va(start);
- initrd_end = (unsigned long)__va(end);
- initrd_below_start_ok = 1;
}
-#endif
diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c
index 7259047d5f9..71a2a0c34c6 100644
--- a/arch/openrisc/kernel/ptrace.c
+++ b/arch/openrisc/kernel/ptrace.c
@@ -33,7 +33,6 @@
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
-#include <asm/system.h>
/*
* Copy the thread state to a regset that can be interpreted by userspace.
@@ -188,11 +187,11 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
*/
ret = -1L;
- audit_syscall_entry(audit_arch(), regs->syscallno,
+ audit_syscall_entry(AUDIT_ARCH_OPENRISC, regs->gpr[11],
regs->gpr[3], regs->gpr[4],
regs->gpr[5], regs->gpr[6]);
- return ret ? : regs->syscallno;
+ return ret ? : regs->gpr[11];
}
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index 1422f747f52..4fc7ccc0a2c 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -40,8 +40,8 @@
#include <linux/device.h>
#include <linux/of_platform.h>
+#include <asm/sections.h>
#include <asm/segment.h>
-#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/types.h>
#include <asm/setup.h>
@@ -51,8 +51,6 @@
#include "vmlinux.h"
-char __initdata cmd_line[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
-
static unsigned long __init setup_memory(void)
{
unsigned long bootmap_size;
@@ -78,7 +76,7 @@ static unsigned long __init setup_memory(void)
ram_start_pfn = PFN_UP(memory_start);
/* free_ram_start_pfn is first page after kernel */
- free_ram_start_pfn = PFN_UP(__pa(&_end));
+ free_ram_start_pfn = PFN_UP(__pa(_end));
ram_end_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_pfn = ram_end_pfn;
@@ -207,18 +205,18 @@ void __init setup_cpuinfo(void)
* Handles the pointer to the device tree that this kernel is to use
* for establishing the available platform devices.
*
- * For now, this is limited to using the built-in device tree. In the future,
- * it is intended that this function will take a pointer to the device tree
- * that is potentially built-in, but potentially also passed in by the
- * bootloader, or discovered by some equally clever means...
+ * Falls back on built-in device tree in case null pointer is passed.
*/
-void __init or32_early_setup(void)
+void __init or32_early_setup(void *fdt)
{
-
- early_init_devtree(__dtb_start);
-
- printk(KERN_INFO "Compiled-in FDT at 0x%p\n", __dtb_start);
+ if (fdt)
+ pr_info("FDT at %p\n", fdt);
+ else {
+ fdt = __dtb_start;
+ pr_info("Compiled-in FDT at %p\n", fdt);
+ }
+ early_init_devtree(fdt);
}
static int __init openrisc_device_probe(void)
@@ -268,7 +266,7 @@ void __init detect_unit_config(unsigned long upr, unsigned long mask,
*
*/
-void __cpuinit calibrate_delay(void)
+void calibrate_delay(void)
{
const int *val;
struct device_node *cpu = NULL;
@@ -286,15 +284,15 @@ void __init setup_arch(char **cmdline_p)
{
unsigned long max_low_pfn;
- unflatten_device_tree();
+ unflatten_and_copy_device_tree();
setup_cpuinfo();
/* process 1's initial memory region is the kernel code/data */
- init_mm.start_code = (unsigned long)&_stext;
- init_mm.end_code = (unsigned long)&_etext;
- init_mm.end_data = (unsigned long)&_edata;
- init_mm.brk = (unsigned long)&_end;
+ init_mm.start_code = (unsigned long)_stext;
+ init_mm.end_code = (unsigned long)_etext;
+ init_mm.end_data = (unsigned long)_edata;
+ init_mm.brk = (unsigned long)_end;
#ifdef CONFIG_BLK_DEV_INITRD
initrd_start = (unsigned long)&__initrd_start;
@@ -317,7 +315,7 @@ void __init setup_arch(char **cmdline_p)
conswitchp = &dummy_con;
#endif
- *cmdline_p = cmd_line;
+ *cmdline_p = boot_command_line;
printk(KERN_INFO "OpenRISC Linux -- http://openrisc.net\n");
}
diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index 95207ab0c99..66775bc07a8 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -28,32 +28,24 @@
#include <linux/tracehook.h>
#include <asm/processor.h>
+#include <asm/syscall.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#define DEBUG_SIG 0
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-asmlinkage long
-_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
-{
- return do_sigaltstack(uss, uoss, regs->sp);
-}
-
struct rt_sigframe {
- struct siginfo *pinfo;
- void *puc;
struct siginfo info;
struct ucontext uc;
unsigned char retcode[16]; /* trampoline code */
};
-static int restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+static int restore_sigcontext(struct pt_regs *regs,
+ struct sigcontext __user *sc)
{
- unsigned int err = 0;
+ int err = 0;
- /* Alwys make any pending restarted system call return -EINTR */
+ /* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
/*
@@ -61,32 +53,27 @@ static int restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
* (sc is already checked for VERIFY_READ since the sigframe was
* checked in sys_sigreturn previously)
*/
- if (__copy_from_user(regs, sc->regs.gpr, 32 * sizeof(unsigned long)))
- goto badframe;
- if (__copy_from_user(&regs->pc, &sc->regs.pc, sizeof(unsigned long)))
- goto badframe;
- if (__copy_from_user(&regs->sr, &sc->regs.sr, sizeof(unsigned long)))
- goto badframe;
+ err |= __copy_from_user(regs, sc->regs.gpr, 32 * sizeof(unsigned long));
+ err |= __copy_from_user(&regs->pc, &sc->regs.pc, sizeof(unsigned long));
+ err |= __copy_from_user(&regs->sr, &sc->regs.sr, sizeof(unsigned long));
/* make sure the SM-bit is cleared so user-mode cannot fool us */
regs->sr &= ~SPR_SR_SM;
+ regs->orig_gpr11 = -1; /* Avoid syscall restart checks */
+
/* TODO: the other ports use regs->orig_XX to disable syscall checks
* after this completes, but we don't use that mechanism. maybe we can
* use it now ?
*/
return err;
-
-badframe:
- return 1;
}
asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
{
struct rt_sigframe *frame = (struct rt_sigframe __user *)regs->sp;
sigset_t set;
- stack_t st;
/*
* Since we stacked the signal on a dword boundary,
@@ -101,20 +88,13 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- do_sigaltstack(&st, NULL, regs->sp);
return regs->gpr[11];
@@ -127,21 +107,18 @@ badframe:
* Set up a signal frame.
*/
-static int setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
- unsigned long mask)
+static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
{
int err = 0;
/* copy the regs */
-
+ /* There should be no need to save callee-saved registers here...
+ * ...but we save them anyway. Revisit this
+ */
err |= __copy_to_user(sc->regs.gpr, regs, 32 * sizeof(unsigned long));
err |= __copy_to_user(&sc->regs.pc, &regs->pc, sizeof(unsigned long));
err |= __copy_to_user(&sc->regs.sr, &regs->sr, sizeof(unsigned long));
- /* then some other stuff */
-
- err |= __put_user(mask, &sc->oldmask);
-
return err;
}
@@ -189,89 +166,70 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
* trampoline which performs the syscall sigreturn, or a provided
* user-mode trampoline.
*/
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
+ struct pt_regs *regs)
{
struct rt_sigframe *frame;
unsigned long return_ip;
int err = 0;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
-
- err |= __put_user(&frame->info, &frame->pinfo);
- err |= __put_user(&frame->uc, &frame->puc);
+ return -EFAULT;
- if (ka->sa.sa_flags & SA_SIGINFO)
- err |= copy_siginfo_to_user(&frame->info, info);
- if (err)
- goto give_sigsegv;
+ /* Create siginfo. */
+ if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);
- /* Clear all the bits of the ucontext we don't use. */
- err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
+ /* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
- err |= __put_user((void *)current->sas_ss_sp,
- &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags);
- err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
+ err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
+ err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* trampoline - the desired return ip is the retcode itself */
return_ip = (unsigned long)&frame->retcode;
- /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
- err |= __put_user(0xa960, (short *)(frame->retcode + 0));
- err |= __put_user(__NR_rt_sigreturn, (short *)(frame->retcode + 2));
+ /* This is:
+ l.ori r11,r0,__NR_sigreturn
+ l.sys 1
+ */
+ err |= __put_user(0xa960, (short *)(frame->retcode + 0));
+ err |= __put_user(__NR_rt_sigreturn, (short *)(frame->retcode + 2));
err |= __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* TODO what is the current->exec_domain stuff and invmap ? */
/* Set up registers for signal handler */
- regs->pc = (unsigned long)ka->sa.sa_handler; /* what we enter NOW */
+ regs->pc = (unsigned long)ksig->ka.sa.sa_handler; /* what we enter NOW */
regs->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
- regs->gpr[3] = (unsigned long)sig; /* arg 1: signo */
+ regs->gpr[3] = (unsigned long)ksig->sig; /* arg 1: signo */
regs->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
regs->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
/* actually move the usp to reflect the stacked frame */
regs->sp = (unsigned long)frame;
- return;
-
-give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ return 0;
}
static inline void
-handle_signal(unsigned long sig,
- siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs *regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
- setup_rt_frame(sig, ka, info, oldset, regs);
+ int ret;
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
+ ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
-
- spin_unlock_irq(&current->sighand->siglock);
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -286,104 +244,99 @@ handle_signal(unsigned long sig,
* mode below.
*/
-void do_signal(struct pt_regs *regs)
+int do_signal(struct pt_regs *regs, int syscall)
{
- siginfo_t info;
- int signr;
- struct k_sigaction ka;
-
- /*
- * We want the common case to go fast, which
- * is why we may in certain cases get here from
- * kernel mode. Just return without doing anything
- * if so.
- */
- if (!user_mode(regs))
- return;
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
- /* If we are coming out of a syscall then we need
- * to check if the syscall was interrupted and wants to be
- * restarted after handling the signal. If so, the original
- * syscall number is put back into r11 and the PC rewound to
- * point at the l.sys instruction that resulted in the
- * original syscall. Syscall results other than the four
- * below mean that the syscall executed to completion and no
- * restart is necessary.
- */
- if (regs->syscallno) {
- int restart = 0;
-
- switch (regs->gpr[11]) {
+ struct ksignal ksig;
+ unsigned long continue_addr = 0;
+ unsigned long restart_addr = 0;
+ unsigned long retval = 0;
+ int restart = 0;
+
+ if (syscall) {
+ continue_addr = regs->pc;
+ restart_addr = continue_addr - 4;
+ retval = regs->gpr[11];
+
+ /*
+ * Setup syscall restart here so that a debugger will
+ * see the already changed PC.
+ */
+ switch (retval) {
case -ERESTART_RESTARTBLOCK:
+ restart = -2;
+ /* Fall through */
case -ERESTARTNOHAND:
- /* Restart if there is no signal handler */
- restart = (signr <= 0);
- break;
case -ERESTARTSYS:
- /* Restart if there no signal handler or
- * SA_RESTART flag is set */
- restart = (signr <= 0 || (ka.sa.sa_flags & SA_RESTART));
- break;
case -ERESTARTNOINTR:
- /* Always restart */
- restart = 1;
+ restart++;
+ regs->gpr[11] = regs->orig_gpr11;
+ regs->pc = restart_addr;
break;
}
-
- if (restart) {
- if (regs->gpr[11] == -ERESTART_RESTARTBLOCK)
- regs->gpr[11] = __NR_restart_syscall;
- else
- regs->gpr[11] = regs->orig_gpr11;
- regs->pc -= 4;
- } else {
- regs->gpr[11] = -EINTR;
- }
}
- if (signr <= 0) {
- /* no signal to deliver so we just put the saved sigmask
- * back */
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ /*
+ * Get the signal to deliver. During the call to get_signal the
+ * debugger may change all our registers so we may need to revert
+ * the decision to restart the syscall; specifically, if the PC is
+ * changed, don't restart the syscall.
+ */
+ if (get_signal(&ksig)) {
+ if (unlikely(restart) && regs->pc == restart_addr) {
+ if (retval == -ERESTARTNOHAND ||
+ retval == -ERESTART_RESTARTBLOCK
+ || (retval == -ERESTARTSYS
+ && !(ksig.ka.sa.sa_flags & SA_RESTART))) {
+ /* No automatic restart */
+ regs->gpr[11] = -EINTR;
+ regs->pc = continue_addr;
+ }
+ }
+ handle_signal(&ksig, regs);
+ } else {
+ /* no handler */
+ restore_saved_sigmask();
+ /*
+ * Restore pt_regs PC as syscall restart will be handled by
+ * kernel without return to userspace
+ */
+ if (unlikely(restart) && regs->pc == restart_addr) {
+ regs->pc = continue_addr;
+ return restart;
}
-
- } else { /* signr > 0 */
- sigset_t *oldset;
-
- if (current_thread_info()->flags & _TIF_RESTORE_SIGMASK)
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
- /* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, &ka, oldset, regs);
- /* a signal was successfully delivered; the saved
- * sigmask will have been stored in the signal frame,
- * and will be restored by sigreturn, so we can simply
- * clear the TIF_RESTORE_SIGMASK flag */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
-
- tracehook_signal_handler(signr, &info, &ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
}
- return;
+ return 0;
}
-asmlinkage void do_notify_resume(struct pt_regs *regs)
+asmlinkage int
+do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall)
{
- if (current_thread_info()->flags & _TIF_SIGPENDING)
- do_signal(regs);
-
- if (current_thread_info()->flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
- }
+ do {
+ if (likely(thread_flags & _TIF_NEED_RESCHED)) {
+ schedule();
+ } else {
+ if (unlikely(!user_mode(regs)))
+ return 0;
+ local_irq_enable();
+ if (thread_flags & _TIF_SIGPENDING) {
+ int restart = do_signal(regs, syscall);
+ if (unlikely(restart)) {
+ /*
+ * Restart without handlers.
+ * Deal with it without leaving
+ * the kernel space.
+ */
+ return restart;
+ }
+ syscall = 0;
+ } else {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ }
+ }
+ local_irq_disable();
+ thread_flags = current_thread_info()->flags;
+ } while (thread_flags & _TIF_WORK_MASK);
+ return 0;
}
diff --git a/arch/openrisc/kernel/sys_or32.c b/arch/openrisc/kernel/sys_or32.c
deleted file mode 100644
index 57060084c0c..00000000000
--- a/arch/openrisc/kernel/sys_or32.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * OpenRISC sys_or32.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * 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 file contains various random system calls that
- * have a non-standard calling sequence on some platforms.
- * Since we don't have to do any backwards compatibility, our
- * versions are done in the most "normal" way possible.
- */
-
-#include <linux/errno.h>
-#include <linux/syscalls.h>
-#include <linux/mm.h>
-
-#include <asm/syscalls.h>
-
-/* These are secondary entry points as the primary entry points are defined in
- * entry.S where we add the 'regs' parameter value
- */
-
-asmlinkage long _sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tid, int __user *child_tid,
- struct pt_regs *regs)
-{
- long ret;
-
- /* FIXME: Is alignment necessary? */
- /* newsp = ALIGN(newsp, 4); */
-
- if (!newsp)
- newsp = regs->sp;
-
- ret = do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-
- return ret;
-}
-
-asmlinkage int _sys_fork(struct pt_regs *regs)
-{
-#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-#else
- return -EINVAL;
-#endif
-}
diff --git a/arch/openrisc/kernel/time.c b/arch/openrisc/kernel/time.c
index bd946ef1623..7c52e9494a8 100644
--- a/arch/openrisc/kernel/time.c
+++ b/arch/openrisc/kernel/time.c
@@ -125,16 +125,13 @@ irqreturn_t __irq_entry timer_interrupt(struct pt_regs *regs)
static __init void openrisc_clockevent_init(void)
{
- clockevents_calc_mult_shift(&clockevent_openrisc_timer,
- cpuinfo.clock_frequency, 4);
+ clockevent_openrisc_timer.cpumask = cpumask_of(0);
/* We only have 28 bits */
- clockevent_openrisc_timer.max_delta_ns =
- clockevent_delta2ns((u32) 0x0fffffff, &clockevent_openrisc_timer);
- clockevent_openrisc_timer.min_delta_ns =
- clockevent_delta2ns(1, &clockevent_openrisc_timer);
- clockevent_openrisc_timer.cpumask = cpumask_of(0);
- clockevents_register_device(&clockevent_openrisc_timer);
+ clockevents_config_and_register(&clockevent_openrisc_timer,
+ cpuinfo.clock_frequency,
+ 100, 0x0fffffff);
+
}
/**
diff --git a/arch/openrisc/kernel/traps.c b/arch/openrisc/kernel/traps.c
index a4ec44a052b..3d3f6062f49 100644
--- a/arch/openrisc/kernel/traps.c
+++ b/arch/openrisc/kernel/traps.c
@@ -33,7 +33,6 @@
#include <linux/kallsyms.h>
#include <asm/uaccess.h>
-#include <asm/system.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <asm/pgtable.h>
@@ -106,16 +105,6 @@ void show_trace_task(struct task_struct *tsk)
*/
}
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
- unsigned long stack;
-
- show_stack(current, &stack);
-}
-
void show_registers(struct pt_regs *regs)
{
int i;
@@ -145,8 +134,8 @@ void show_registers(struct pt_regs *regs)
regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
- printk(" RES: %08lx oGPR11: %08lx syscallno: %08lx\n",
- regs->gpr[11], regs->orig_gpr11, regs->syscallno);
+ printk(" RES: %08lx oGPR11: %08lx\n",
+ regs->gpr[11], regs->orig_gpr11);
printk("Process %s (pid: %d, stackpage=%08lx)\n",
current->comm, current->pid, (unsigned long)current);
@@ -207,8 +196,8 @@ void nommu_dump_state(struct pt_regs *regs,
regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
- printk(" RES: %08lx oGPR11: %08lx syscallno: %08lx\n",
- regs->gpr[11], regs->orig_gpr11, regs->syscallno);
+ printk(" RES: %08lx oGPR11: %08lx\n",
+ regs->gpr[11], regs->orig_gpr11);
printk("Process %s (pid: %d, stackpage=%08lx)\n",
((struct task_struct *)(__pa(current)))->comm,
diff --git a/arch/openrisc/kernel/vmlinux.h b/arch/openrisc/kernel/vmlinux.h
index ee842a2d3f3..bbcdf21b0b3 100644
--- a/arch/openrisc/kernel/vmlinux.h
+++ b/arch/openrisc/kernel/vmlinux.h
@@ -1,12 +1,8 @@
#ifndef __OPENRISC_VMLINUX_H_
#define __OPENRISC_VMLINUX_H_
-extern char _stext, _etext, _edata, _end;
#ifdef CONFIG_BLK_DEV_INITRD
extern char __initrd_start, __initrd_end;
-extern char __initramfs_start;
#endif
-extern u32 __dtb_start[];
-
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 11:03:53 +0000