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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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45bb1674b9
Make OLPC fully depend on device tree, and use it to identify the OLPC platform details. Some nodes are exposed as platform devices where we plan to use device tree for device probing. Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> LKML-Reference: <20110313151017.C255F9D401E@zog.reactivated.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
#ifndef _ASM_X86_OLPC_OFW_H
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#define _ASM_X86_OLPC_OFW_H
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/* index into the page table containing the entry OFW occupies */
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#define OLPC_OFW_PDE_NR 1022
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#define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */
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#ifdef CONFIG_OLPC
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extern bool olpc_ofw_is_installed(void);
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/* run an OFW command by calling into the firmware */
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#define olpc_ofw(name, args, res) \
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__olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res)
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extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
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void **res);
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/* determine whether OFW is available and lives in the proper memory */
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extern void olpc_ofw_detect(void);
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/* install OFW's pde permanently into the kernel's pgtable */
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extern void setup_olpc_ofw_pgd(void);
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/* check if OFW was detected during boot */
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extern bool olpc_ofw_present(void);
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extern void olpc_dt_build_devicetree(void);
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#else /* !CONFIG_OLPC */
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static inline void olpc_ofw_detect(void) { }
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static inline void setup_olpc_ofw_pgd(void) { }
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static inline void olpc_dt_build_devicetree(void) { }
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#endif /* !CONFIG_OLPC */
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#endif /* _ASM_X86_OLPC_OFW_H */
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