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keystone2: add possibility to turn off all dsps

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By default all DSPs are turned off, for another case option
to turn off them is added in this commit.
Also add command to turn off itself.

Acked-by: Murali Karicheri <m-maricheri2@ti.com>
Signed-off-by: Hao Zhang <hzhang@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
This commit is contained in:
Hao Zhang 2014-07-09 19:48:44 +03:00 committed by Tom Rini
parent 4984bce41f
commit 7b26c1f608
4 changed files with 83 additions and 2 deletions
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59
arch/arm/cpu/armv7/keystone/keystone.c
View file

@ -9,6 +9,9 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/mon.h>
#include <asm/arch/psc_defs.h>
#include <asm/arch/hardware.h>
#include <asm/arch/hardware.h>
/**
@ -26,3 +29,59 @@ int cpu_to_bus(u32 *ptr, u32 length)
return 0;
}
static int turn_off_myself(void)
{
printf("Turning off ourselves\r\n");
mon_power_off(0);
psc_disable_module(KS2_LPSC_TETRIS);
psc_disable_domain(KS2_TETRIS_PWR_DOMAIN);
asm volatile ("isb\n"
"dsb\n"
"wfi\n");
printf("What! Should not see that\n");
return 0;
}
static void turn_off_all_dsps(int num_dsps)
{
int i;
for (i = 0; i < num_dsps; i++) {
if (psc_disable_module(i + KS2_LPSC_GEM_0))
printf("Cannot disable module for #%d DSP", i);
if (psc_disable_domain(i + 8))
printf("Cannot disable domain for #%d DSP", i);
}
}
int do_killme_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
return turn_off_myself();
}
U_BOOT_CMD(
killme, 1, 0, do_killme_cmd,
"turn off main ARM core",
"turn off main ARM core. Should not live after that :(\n"
);
int misc_init_r(void)
{
char *env;
long ks2_debug = 0;
env = getenv("ks2_debug");
if (env)
ks2_debug = simple_strtol(env, NULL, 0);
if ((ks2_debug & DBG_LEAVE_DSPS_ON) == 0)
turn_off_all_dsps(KS2_NUM_DSPS);
return 0;
}

5
arch/arm/include/asm/arch-keystone/hardware-k2hk.h
View file

@ -68,7 +68,6 @@
#define K2HK_LPSC_VUSR0 12
#define K2HK_LPSC_CHIP_SRSS 13
#define K2HK_LPSC_MSMC 14
#define K2HK_LPSC_GEM_0 15
#define K2HK_LPSC_GEM_1 16
#define K2HK_LPSC_GEM_2 17
#define K2HK_LPSC_GEM_3 18
@ -105,7 +104,6 @@
#define K2HK_LPSC_VUSR1 49
#define K2HK_LPSC_XGE 50
#define K2HK_LPSC_ARM_SREFLEX 51
#define K2HK_LPSC_TETRIS 52
/* DDR3A definitions */
#define K2HK_DDR3A_EMIF_CTRL_BASE 0x21010000
@ -137,4 +135,7 @@
/* MSMC control */
#define K2HK_MSMC_CTRL_BASE 0x0bc00000
/* Number of DSP cores */
#define KS2_NUM_DSPS 8
#endif /* __ASM_ARCH_HARDWARE_H */

6
arch/arm/include/asm/arch-keystone/hardware.h
View file

@ -87,11 +87,17 @@ typedef volatile unsigned int *dv_reg_p;
/* PSC */
#define KS2_PSC_BASE 0x02350000
#define KS2_LPSC_GEM_0 15
#define KS2_LPSC_TETRIS 52
#define KS2_TETRIS_PWR_DOMAIN 31
/* AEMIF */
#define KS2_AEMIF_CNTRL_BASE 0x21000a00
#define DAVINCI_ASYNC_EMIF_CNTRL_BASE KS2_AEMIF_CNTRL_BASE
/* Flag from ks2_debug options to check if DSPs need to stay ON */
#define DBG_LEAVE_DSPS_ON 0x1
#ifdef CONFIG_SOC_K2HK
#include <asm/arch/hardware-k2hk.h>
#endif

15
arch/arm/include/asm/arch-keystone/mon.h Normal file
View file

@ -0,0 +1,15 @@
/*
* K2HK: secure kernel command header file
*
* (C) Copyright 2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _MON_H_
#define _MON_H_
int mon_power_off(int core_id);
#endif