Commit f09d3174 authored by Eugeniy Paltsev's avatar Eugeniy Paltsev Committed by Vineet Gupta
Browse files

ARC: allow userspace DSP applications to use AGU extensions 



To be able to run DSP-enabled userspace applications with AGU
(address generation unit) extensions we additionally need to
save and restore following registers at context switch:
 * AGU_AP*
 * AGU_OS*
 * AGU_MOD*

Reviewed-by: default avatarVineet Gupta <vgupta@synopsys.com>
Signed-off-by: default avatarEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 7321e2ea

arch/arc/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -445,6 +445,15 @@ config ARC_DSP_USERSPACE 
	help

	  DSP extension presence in HW, support save / restore DSP registers to

	  run DSP-enabled userspace applications



config ARC_DSP_AGU_USERSPACE

	bool "Support DSP with AGU for userspace apps"

	select ARC_HAS_ACCL_REGS

	select ARC_DSP_HANDLED

	select ARC_DSP_SAVE_RESTORE_REGS

	help

	  DSP and AGU extensions presence in HW, support save / restore DSP

	  and AGU registers to run DSP-enabled userspace applications

endchoice



config ARC_IRQ_NO_AUTOSAVE

arch/arc/include/asm/arcregs.h

+12 −0
Original line number Diff line number Diff line
@@ -132,6 +132,18 @@ 
#define ARC_AUX_DSP_CTRL	0x59F

#define ARC_AUX_DSP_FFT_CTRL	0x59E



#define ARC_AUX_AGU_BUILD	0xCC

#define ARC_AUX_AGU_AP0		0x5C0

#define ARC_AUX_AGU_AP1		0x5C1

#define ARC_AUX_AGU_AP2		0x5C2

#define ARC_AUX_AGU_AP3		0x5C3

#define ARC_AUX_AGU_OS0		0x5D0

#define ARC_AUX_AGU_OS1		0x5D1

#define ARC_AUX_AGU_MOD0	0x5E0

#define ARC_AUX_AGU_MOD1	0x5E1

#define ARC_AUX_AGU_MOD2	0x5E2

#define ARC_AUX_AGU_MOD3	0x5E3



#ifndef __ASSEMBLY__



#include <soc/arc/aux.h>

arch/arc/include/asm/asserts.h

+10 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
/* Helpers to sanitize config options. */



void chk_opt_strict(char *opt_name, bool hw_exists, bool opt_ena);

void chk_opt_weak(char *opt_name, bool hw_exists, bool opt_ena);



/*

 * Check required config option:
@@ -21,4 +22,13 @@ void chk_opt_strict(char *opt_name, bool hw_exists, bool opt_ena); 
	chk_opt_strict(#opt_name, hw_exists, IS_ENABLED(opt_name));	\

})



/*

 * Check optional config option:

 *  - panic in case of OPT enabled but corresponding HW absent.

*/

#define CHK_OPT_WEAK(opt_name, hw_exists)				\

({									\

	chk_opt_weak(#opt_name, hw_exists, IS_ENABLED(opt_name));	\

})



#endif /* __ASM_ARC_ASSERTS_H */

arch/arc/include/asm/dsp-impl.h

+24 −0
Original line number Diff line number Diff line
@@ -103,6 +103,21 @@ static inline void dsp_save_restore(struct task_struct *prev, 


	DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_BFLY0);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_FFT_CTRL);



#ifdef CONFIG_ARC_DSP_AGU_USERSPACE

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP0);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP1);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP2);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP3);



	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS0);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS1);



	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD0);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD1);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD2);

	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD3);

#endif /* CONFIG_ARC_DSP_AGU_USERSPACE */

}



#else /* !CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
@@ -117,9 +132,18 @@ static inline bool dsp_exist(void) 
	return !!bcr.ver;

}



static inline bool agu_exist(void)

{

	struct bcr_generic bcr;



	READ_BCR(ARC_AUX_AGU_BUILD, bcr);

	return !!bcr.ver;

}



static inline void dsp_config_check(void)

{

	CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());

	CHK_OPT_WEAK(CONFIG_ARC_DSP_AGU_USERSPACE, agu_exist());

}



#endif /* __ASEMBLY__ */

arch/arc/include/asm/dsp.h

+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,11 @@ 
 */

struct dsp_callee_regs {

	unsigned long ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_FFT_CTRL;

#ifdef CONFIG_ARC_DSP_AGU_USERSPACE

	unsigned long AGU_AP0, AGU_AP1, AGU_AP2, AGU_AP3;

	unsigned long AGU_OS0, AGU_OS1;

	unsigned long AGU_MOD0, AGU_MOD1, AGU_MOD2, AGU_MOD3;

#endif

};



#endif /* !__ASSEMBLY__ */

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