mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-11-01 10:33:27 +00:00
a7f626c194
Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
|
|
* Port on Texas Instruments TMS320C6x architecture
|
|
*
|
|
* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef _ASM_C6X_DELAY_H
|
|
#define _ASM_C6X_DELAY_H
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
extern unsigned int ticks_per_ns_scaled;
|
|
|
|
static inline void __delay(unsigned long loops)
|
|
{
|
|
uint32_t tmp;
|
|
|
|
/* 6 cycles per loop */
|
|
asm volatile (" mv .s1 %0,%1\n"
|
|
"0: [%1] b .s1 0b\n"
|
|
" add .l1 -6,%0,%0\n"
|
|
" cmplt .l1 1,%0,%1\n"
|
|
" nop 3\n"
|
|
: "+a"(loops), "=A"(tmp));
|
|
}
|
|
|
|
static inline void _c6x_tickdelay(unsigned int x)
|
|
{
|
|
uint32_t cnt, endcnt;
|
|
|
|
asm volatile (" mvc .s2 TSCL,%0\n"
|
|
" add .s2x %0,%1,%2\n"
|
|
" || mvk .l2 1,B0\n"
|
|
"0: [B0] b .s2 0b\n"
|
|
" mvc .s2 TSCL,%0\n"
|
|
" sub .s2 %0,%2,%0\n"
|
|
" cmpgt .l2 0,%0,B0\n"
|
|
" nop 2\n"
|
|
: "=b"(cnt), "+a"(x), "=b"(endcnt) : : "B0");
|
|
}
|
|
|
|
/* use scaled math to avoid slow division */
|
|
#define C6X_NDELAY_SCALE 10
|
|
|
|
static inline void _ndelay(unsigned int n)
|
|
{
|
|
_c6x_tickdelay((ticks_per_ns_scaled * n) >> C6X_NDELAY_SCALE);
|
|
}
|
|
|
|
static inline void _udelay(unsigned int n)
|
|
{
|
|
while (n >= 10) {
|
|
_ndelay(10000);
|
|
n -= 10;
|
|
}
|
|
while (n-- > 0)
|
|
_ndelay(1000);
|
|
}
|
|
|
|
#define udelay(x) _udelay((unsigned int)(x))
|
|
#define ndelay(x) _ndelay((unsigned int)(x))
|
|
|
|
#endif /* _ASM_C6X_DELAY_H */
|