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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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79714acbab
This patch is the hwblk base implementation, containing structures and shared functions dealing with hardware blocks. A each processor model should provide a list of hwblks and describe which module stop bit that is associated with each hwblck and how the hwblks are grouped together into areas. The shared code keeps track of the usage count for each hwblk and the areas. Fallback implementations for processor specific code are also kept as weak symbols. The clock framework, the runtime pm code and cpuidle will all tie into this hwblk implementation. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
#ifndef __ASM_SH_HWBLK_H
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#define __ASM_SH_HWBLK_H
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#include <asm/clock.h>
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#include <asm/io.h>
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#define HWBLK_AREA_FLAG_PARENT (1 << 0) /* valid parent */
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#define HWBLK_AREA(_flags, _parent) \
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{ \
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.flags = _flags, \
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.parent = _parent, \
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}
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struct hwblk_area {
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unsigned long cnt;
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unsigned char parent;
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unsigned char flags;
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};
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#define HWBLK(_mstp, _bit, _area) \
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{ \
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.mstp = (void __iomem *)_mstp, \
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.bit = _bit, \
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.area = _area, \
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}
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struct hwblk {
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void __iomem *mstp;
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unsigned char bit;
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unsigned char area;
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unsigned long cnt;
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};
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struct hwblk_info {
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struct hwblk_area *areas;
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int nr_areas;
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struct hwblk *hwblks;
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int nr_hwblks;
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};
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/* Should be defined by processor-specific code */
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int arch_hwblk_init(void);
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int arch_hwblk_sleep_mode(void);
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int hwblk_register(struct hwblk_info *info);
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int hwblk_init(void);
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/* allow clocks to enable and disable hardware blocks */
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#define SH_HWBLK_CLK(_name, _id, _parent, _hwblk, _flags) \
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{ \
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.name = _name, \
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.id = _id, \
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.parent = _parent, \
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.arch_flags = _hwblk, \
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.flags = _flags, \
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}
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int sh_hwblk_clk_register(struct clk *clks, int nr);
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#endif /* __ASM_SH_HWBLK_H */
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