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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b6338bdc83
The new fncpy API is better suited* for copying some
code to SRAM at runtime. This patch changes the ad-hoc
code to the more generic fncpy API.
*: 1. fncpy ensures that the thumb mode bit is propagated,
2. fncpy provides the security of type safety between the
original function and the sram function pointer.
Tested OK on OMAP3 in low power modes (RET/OFF)
using omap2plus_defconfig with !CONFIG_THUMB2_KERNEL.
Compile tested on OMAP1/2 using omap1_defconfig.
Boot tested on OMAP1 & OMAP2
Tested OK with suspend/resume on OMAP2420/n810
Boots fine on osk5912 and n800
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Dave Martin <dave.martin@linaro.org>
Tested-by: Kevin Hilman <khilman@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
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* arch/arm/plat-omap/include/mach/sram.h
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*
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* Interface for functions that need to be run in internal SRAM
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_OMAP_SRAM_H
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#define __ARCH_ARM_OMAP_SRAM_H
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#ifndef __ASSEMBLY__
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#include <asm/fncpy.h>
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extern void *omap_sram_push_address(unsigned long size);
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/* Macro to push a function to the internal SRAM, using the fncpy API */
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#define omap_sram_push(funcp, size) ({ \
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typeof(&(funcp)) _res = NULL; \
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void *_sram_address = omap_sram_push_address(size); \
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if (_sram_address) \
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_res = fncpy(_sram_address, &(funcp), size); \
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_res; \
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})
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extern void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl);
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extern void omap2_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
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u32 base_cs, u32 force_unlock);
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extern void omap2_sram_reprogram_sdrc(u32 perf_level, u32 dll_val,
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u32 mem_type);
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extern u32 omap2_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, int bypass);
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extern u32 omap3_configure_core_dpll(
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u32 m2, u32 unlock_dll, u32 f, u32 inc,
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u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
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u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
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u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
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u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
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extern void omap3_sram_restore_context(void);
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/* Do not use these */
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extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
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extern unsigned long omap1_sram_reprogram_clock_sz;
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extern void omap24xx_sram_reprogram_clock(u32 ckctl, u32 dpllctl);
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extern unsigned long omap24xx_sram_reprogram_clock_sz;
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extern void omap242x_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
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u32 base_cs, u32 force_unlock);
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extern unsigned long omap242x_sram_ddr_init_sz;
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extern u32 omap242x_sram_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val,
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int bypass);
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extern unsigned long omap242x_sram_set_prcm_sz;
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extern void omap242x_sram_reprogram_sdrc(u32 perf_level, u32 dll_val,
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u32 mem_type);
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extern unsigned long omap242x_sram_reprogram_sdrc_sz;
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extern void omap243x_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl,
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u32 base_cs, u32 force_unlock);
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extern unsigned long omap243x_sram_ddr_init_sz;
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extern u32 omap243x_sram_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val,
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int bypass);
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extern unsigned long omap243x_sram_set_prcm_sz;
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extern void omap243x_sram_reprogram_sdrc(u32 perf_level, u32 dll_val,
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u32 mem_type);
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extern unsigned long omap243x_sram_reprogram_sdrc_sz;
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extern u32 omap3_sram_configure_core_dpll(
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u32 m2, u32 unlock_dll, u32 f, u32 inc,
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u32 sdrc_rfr_ctrl_0, u32 sdrc_actim_ctrl_a_0,
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u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
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u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
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u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
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extern unsigned long omap3_sram_configure_core_dpll_sz;
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#ifdef CONFIG_PM
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extern void omap_push_sram_idle(void);
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#else
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static inline void omap_push_sram_idle(void) {}
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#endif /* CONFIG_PM */
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#endif /* __ASSEMBLY__ */
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/*
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* OMAP2+: define the SRAM PA addresses.
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* Used by the SRAM management code and the idle sleep code.
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*/
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#define OMAP2_SRAM_PA 0x40200000
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#define OMAP3_SRAM_PA 0x40200000
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#define OMAP4_SRAM_PA 0x40300000
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#endif
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