Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _XEN_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _XEN_PAGE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) /* The hypercall interface supports only 4KB page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define XEN_PAGE_SHIFT	12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define XEN_PAGE_SIZE	(_AC(1, UL) << XEN_PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define XEN_PAGE_MASK	(~(XEN_PAGE_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define xen_offset_in_page(p)	((unsigned long)(p) & ~XEN_PAGE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * We assume that PAGE_SIZE is a multiple of XEN_PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * XXX: Add a BUILD_BUG_ON?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define xen_pfn_to_page(xen_pfn)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	(pfn_to_page((unsigned long)(xen_pfn) >> (PAGE_SHIFT - XEN_PAGE_SHIFT)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define page_to_xen_pfn(page)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	((page_to_pfn(page)) << (PAGE_SHIFT - XEN_PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define XEN_PFN_PER_PAGE	(PAGE_SIZE / XEN_PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define XEN_PFN_DOWN(x)	((x) >> XEN_PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define XEN_PFN_UP(x)	(((x) + XEN_PAGE_SIZE-1) >> XEN_PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/xen/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* Return the GFN associated to the first 4KB of the page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static inline unsigned long xen_page_to_gfn(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	return pfn_to_gfn(page_to_xen_pfn(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct xen_memory_region {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	unsigned long start_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	unsigned long n_pfns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820_MAX_ENTRIES_ZEROPAGE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) extern __initdata
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) extern unsigned long xen_released_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #endif	/* _XEN_PAGE_H */