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-rw-r--r--arch/hexagon/Kconfig5
-rw-r--r--arch/hexagon/include/asm/uaccess.h31
-rw-r--r--arch/hexagon/kernel/dma.c57
-rw-r--r--arch/hexagon/kernel/hexagon_ksyms.c1
-rw-r--r--arch/hexagon/kernel/traps.c4
-rw-r--r--arch/hexagon/mm/Makefile2
-rw-r--r--arch/hexagon/mm/strnlen_user.S126
7 files changed, 14 insertions, 212 deletions
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index e5a852080730..15dd8f38b698 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -7,6 +7,7 @@ config HEXAGON
select ARCH_32BIT_OFF_T
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_NO_PREEMPT
+ select DMA_GLOBAL_POOL
# Other pending projects/to-do items.
# select HAVE_REGS_AND_STACK_ACCESS_API
# select HAVE_HW_BREAKPOINT if PERF_EVENTS
@@ -31,6 +32,7 @@ config HEXAGON
select GENERIC_CPU_DEVICES
select SET_FS
select ARCH_WANT_LD_ORPHAN_WARN
+ select TRACE_IRQFLAGS_SUPPORT
help
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.
@@ -52,9 +54,6 @@ config EARLY_PRINTK
config MMU
def_bool y
-config TRACE_IRQFLAGS_SUPPORT
- def_bool y
-
config GENERIC_CSUM
def_bool y
diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h
index c1019a736ff1..ef5bfef8d490 100644
--- a/arch/hexagon/include/asm/uaccess.h
+++ b/arch/hexagon/include/asm/uaccess.h
@@ -57,38 +57,7 @@ unsigned long raw_copy_to_user(void __user *to, const void *from,
__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count);
#define __clear_user(a, s) __clear_user_hexagon((a), (s))
-#define __strncpy_from_user(dst, src, n) hexagon_strncpy_from_user(dst, src, n)
-
-/* get around the ifndef in asm-generic/uaccess.h */
-#define __strnlen_user __strnlen_user
-
-extern long __strnlen_user(const char __user *src, long n);
-
-static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
- long n);
-
#include <asm-generic/uaccess.h>
-/* Todo: an actual accelerated version of this. */
-static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
- long n)
-{
- long res = __strnlen_user(src, n);
-
- if (unlikely(!res))
- return -EFAULT;
-
- if (res > n) {
- long left = raw_copy_from_user(dst, src, n);
- if (unlikely(left))
- memset(dst + (n - left), 0, left);
- return n;
- } else {
- long left = raw_copy_from_user(dst, src, res);
- if (unlikely(left))
- memset(dst + (res - left), 0, left);
- return res-1;
- }
-}
#endif
diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c
index 00b9a81075dd..882680e81a30 100644
--- a/arch/hexagon/kernel/dma.c
+++ b/arch/hexagon/kernel/dma.c
@@ -7,54 +7,8 @@
#include <linux/dma-map-ops.h>
#include <linux/memblock.h>
-#include <linux/genalloc.h>
-#include <linux/module.h>
#include <asm/page.h>
-static struct gen_pool *coherent_pool;
-
-
-/* Allocates from a pool of uncached memory that was reserved at boot time */
-
-void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_addr,
- gfp_t flag, unsigned long attrs)
-{
- void *ret;
-
- /*
- * Our max_low_pfn should have been backed off by 16MB in
- * mm/init.c to create DMA coherent space. Use that as the VA
- * for the pool.
- */
-
- if (coherent_pool == NULL) {
- coherent_pool = gen_pool_create(PAGE_SHIFT, -1);
-
- if (coherent_pool == NULL)
- panic("Can't create %s() memory pool!", __func__);
- else
- gen_pool_add(coherent_pool,
- (unsigned long)pfn_to_virt(max_low_pfn),
- hexagon_coherent_pool_size, -1);
- }
-
- ret = (void *) gen_pool_alloc(coherent_pool, size);
-
- if (ret) {
- memset(ret, 0, size);
- *dma_addr = (dma_addr_t) virt_to_phys(ret);
- } else
- *dma_addr = ~0;
-
- return ret;
-}
-
-void arch_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_addr, unsigned long attrs)
-{
- gen_pool_free(coherent_pool, (unsigned long) vaddr, size);
-}
-
void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
enum dma_data_direction dir)
{
@@ -77,3 +31,14 @@ void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
BUG();
}
}
+
+/*
+ * Our max_low_pfn should have been backed off by 16MB in mm/init.c to create
+ * DMA coherent space. Use that for the pool.
+ */
+static int __init hexagon_dma_init(void)
+{
+ return dma_init_global_coherent(PFN_PHYS(max_low_pfn),
+ hexagon_coherent_pool_size);
+}
+core_initcall(hexagon_dma_init);
diff --git a/arch/hexagon/kernel/hexagon_ksyms.c b/arch/hexagon/kernel/hexagon_ksyms.c
index 35545a7386a0..ec56ce2d92a2 100644
--- a/arch/hexagon/kernel/hexagon_ksyms.c
+++ b/arch/hexagon/kernel/hexagon_ksyms.c
@@ -15,7 +15,6 @@ EXPORT_SYMBOL(__clear_user_hexagon);
EXPORT_SYMBOL(raw_copy_from_user);
EXPORT_SYMBOL(raw_copy_to_user);
EXPORT_SYMBOL(iounmap);
-EXPORT_SYMBOL(__strnlen_user);
EXPORT_SYMBOL(__vmgetie);
EXPORT_SYMBOL(__vmsetie);
EXPORT_SYMBOL(__vmyield);
diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index 904134b37232..edfc35dafeb1 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c
@@ -28,10 +28,6 @@
#define TRAP_SYSCALL 1
#define TRAP_DEBUG 0xdb
-void __init trap_init(void)
-{
-}
-
#ifdef CONFIG_GENERIC_BUG
/* Maybe should resemble arch/sh/kernel/traps.c ?? */
int is_valid_bugaddr(unsigned long addr)
diff --git a/arch/hexagon/mm/Makefile b/arch/hexagon/mm/Makefile
index 893838499591..49911a906fd0 100644
--- a/arch/hexagon/mm/Makefile
+++ b/arch/hexagon/mm/Makefile
@@ -4,4 +4,4 @@
#
obj-y := init.o ioremap.o uaccess.o vm_fault.o cache.o
-obj-y += copy_to_user.o copy_from_user.o strnlen_user.o vm_tlb.o
+obj-y += copy_to_user.o copy_from_user.o vm_tlb.o
diff --git a/arch/hexagon/mm/strnlen_user.S b/arch/hexagon/mm/strnlen_user.S
deleted file mode 100644
index 4b5574a7cc9c..000000000000
--- a/arch/hexagon/mm/strnlen_user.S
+++ /dev/null
@@ -1,126 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * User string length functions for kernel
- *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- */
-
-#define isrc r0
-#define max r1 /* Do not change! */
-
-#define end r2
-#define tmp1 r3
-
-#define obo r6 /* off-by-one */
-#define start r7
-#define mod8 r8
-#define dbuf r15:14
-#define dcmp r13:12
-
-/*
- * The vector mask version of this turned out *really* badly.
- * The hardware loop version also turned out *really* badly.
- * Seems straight pointer arithmetic basically wins here.
- */
-
-#define fname __strnlen_user
-
- .text
- .global fname
- .type fname, @function
- .p2align 5 /* why? */
-fname:
- {
- mod8 = and(isrc,#7);
- end = add(isrc,max);
- start = isrc;
- }
- {
- P0 = cmp.eq(mod8,#0);
- mod8 = and(end,#7);
- dcmp = #0;
- if (P0.new) jump:t dw_loop; /* fire up the oven */
- }
-
-alignment_loop:
-fail_1: {
- tmp1 = memb(start++#1);
- }
- {
- P0 = cmp.eq(tmp1,#0);
- if (P0.new) jump:nt exit_found;
- P1 = cmp.gtu(end,start);
- mod8 = and(start,#7);
- }
- {
- if (!P1) jump exit_error; /* hit the end */
- P0 = cmp.eq(mod8,#0);
- }
- {
- if (!P0) jump alignment_loop;
- }
-
-
-
-dw_loop:
-fail_2: {
- dbuf = memd(start);
- obo = add(start,#1);
- }
- {
- P0 = vcmpb.eq(dbuf,dcmp);
- }
- {
- tmp1 = P0;
- P0 = cmp.gtu(end,start);
- }
- {
- tmp1 = ct0(tmp1);
- mod8 = and(end,#7);
- if (!P0) jump end_check;
- }
- {
- P0 = cmp.eq(tmp1,#32);
- if (!P0.new) jump:nt exit_found;
- if (!P0.new) start = add(obo,tmp1);
- }
- {
- start = add(start,#8);
- jump dw_loop;
- } /* might be nice to combine these jumps... */
-
-
-end_check:
- {
- P0 = cmp.gt(tmp1,mod8);
- if (P0.new) jump:nt exit_error; /* neverfound! */
- start = add(obo,tmp1);
- }
-
-exit_found:
- {
- R0 = sub(start,isrc);
- jumpr R31;
- }
-
-exit_error:
- {
- R0 = add(max,#1);
- jumpr R31;
- }
-
- /* Uh, what does the "fixup" return here? */
- .falign
-fix_1:
- {
- R0 = #0;
- jumpr R31;
- }
-
- .size fname,.-fname
-
-
-.section __ex_table,"a"
-.long fail_1,fix_1
-.long fail_2,fix_1
-.previous