7adfb58fbd
This patch defines (and provides) entry points for certain user space functions at fixed addresses. The Blackfin has no usable atomic instructions, but we can ensure that these code sequences appear atomic from a user space point of view by detecting when we're in the process of executing them during the interrupt handler return path. This allows much more efficient pthread lock implementations than the bfin_spinlock syscall we're currently using. Also provided is a small sys_rt_sigreturn stub which can be used by the signal handler setup code. The signal.c part will be committed separately. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/*
|
|
* File: include/asm-blackfin/bfin-global.h
|
|
* Based on:
|
|
* Author: *
|
|
* Created:
|
|
* Description: Global extern defines for blackfin
|
|
*
|
|
* Modified:
|
|
* Copyright 2004-2006 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* 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 program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef _BFIN_GLOBAL_H_
|
|
#define _BFIN_GLOBAL_H_
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm-generic/sections.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/user.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/types.h>
|
|
|
|
#if defined(CONFIG_DMA_UNCACHED_2M)
|
|
# define DMA_UNCACHED_REGION (2 * 1024 * 1024)
|
|
#elif defined(CONFIG_DMA_UNCACHED_1M)
|
|
# define DMA_UNCACHED_REGION (1024 * 1024)
|
|
#else
|
|
# define DMA_UNCACHED_REGION (0)
|
|
#endif
|
|
|
|
extern unsigned long get_cclk(void);
|
|
extern unsigned long get_sclk(void);
|
|
|
|
extern void dump_thread(struct pt_regs *regs, struct user *dump);
|
|
extern void dump_bfin_regs(struct pt_regs *fp, void *retaddr);
|
|
extern void dump_bfin_trace_buffer(void);
|
|
|
|
extern int init_arch_irq(void);
|
|
extern void bfin_reset(void);
|
|
extern void _cplb_hdr(void);
|
|
/* Blackfin cache functions */
|
|
extern void bfin_icache_init(void);
|
|
extern void bfin_dcache_init(void);
|
|
extern int read_iloc(void);
|
|
extern int bfin_console_init(void);
|
|
extern asmlinkage void lower_to_irq14(void);
|
|
extern void init_dma(void);
|
|
extern void program_IAR(void);
|
|
extern void evt14_softirq(void);
|
|
extern asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs);
|
|
extern void bfin_gpio_interrupt_setup(int irq, int irq_pfx, int type);
|
|
|
|
extern asmlinkage void finish_atomic_sections (struct pt_regs *regs);
|
|
extern char fixed_code_start;
|
|
extern char fixed_code_end;
|
|
extern int atomic_xchg32(void);
|
|
extern int atomic_cas32(void);
|
|
extern int atomic_add32(void);
|
|
extern int atomic_sub32(void);
|
|
extern int atomic_ior32(void);
|
|
extern int atomic_and32(void);
|
|
extern int atomic_xor32(void);
|
|
extern void sigreturn_stub(void);
|
|
|
|
extern void *l1_data_A_sram_alloc(size_t);
|
|
extern void *l1_data_B_sram_alloc(size_t);
|
|
extern void *l1_inst_sram_alloc(size_t);
|
|
extern void *l1_data_sram_alloc(size_t);
|
|
extern void *l1_data_sram_zalloc(size_t);
|
|
extern int l1_data_A_sram_free(const void*);
|
|
extern int l1_data_B_sram_free(const void*);
|
|
extern int l1_inst_sram_free(const void*);
|
|
extern int l1_data_sram_free(const void*);
|
|
extern int sram_free(const void*);
|
|
|
|
#define L1_INST_SRAM 0x00000001
|
|
#define L1_DATA_A_SRAM 0x00000002
|
|
#define L1_DATA_B_SRAM 0x00000004
|
|
#define L1_DATA_SRAM 0x00000006
|
|
extern void *sram_alloc_with_lsl(size_t, unsigned long);
|
|
extern int sram_free_with_lsl(const void*);
|
|
|
|
extern void led_on(int);
|
|
extern void led_off(int);
|
|
extern void led_toggle(int);
|
|
extern void led_disp_num(int);
|
|
extern void led_toggle_num(int);
|
|
extern void init_leds(void);
|
|
|
|
extern char *bfin_board_name __attribute__ ((weak));
|
|
extern unsigned long wall_jiffies;
|
|
extern unsigned long ipdt_table[];
|
|
extern unsigned long dpdt_table[];
|
|
extern unsigned long icplb_table[];
|
|
extern unsigned long dcplb_table[];
|
|
|
|
extern unsigned long ipdt_swapcount_table[];
|
|
extern unsigned long dpdt_swapcount_table[];
|
|
|
|
extern unsigned long table_start, table_end;
|
|
|
|
extern u16 _bfin_swrst; /* shadow for Software Reset Register (SWRST) */
|
|
extern struct file_operations dpmc_fops;
|
|
extern char _start;
|
|
extern unsigned long _ramstart, _ramend, _rambase;
|
|
extern unsigned long memory_start, memory_end, physical_mem_end;
|
|
extern char _stext_l1[], _etext_l1[], _sdata_l1[], _edata_l1[], _sbss_l1[],
|
|
_ebss_l1[], _l1_lma_start[], _sdata_b_l1[], _ebss_b_l1[];
|
|
|
|
#ifdef CONFIG_MTD_UCLINUX
|
|
extern unsigned long memory_mtd_start, memory_mtd_end, mtd_size;
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif /* _BLACKFIN_H_ */
|