diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/vphn.c')
-rw-r--r-- | arch/powerpc/mm/book3s64/vphn.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/arch/powerpc/mm/book3s64/vphn.c b/arch/powerpc/mm/book3s64/vphn.c deleted file mode 100644 index 0ee7734afb50..000000000000 --- a/arch/powerpc/mm/book3s64/vphn.c +++ /dev/null @@ -1,73 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <asm/byteorder.h> -#include "vphn.h" - -/* - * The associativity domain numbers are returned from the hypervisor as a - * stream of mixed 16-bit and 32-bit fields. The stream is terminated by the - * special value of "all ones" (aka. 0xffff) and its size may not exceed 48 - * bytes. - * - * --- 16-bit fields --> - * _________________________ - * | 0 | 1 | 2 | 3 | be_packed[0] - * ------+-----+-----+------ - * _________________________ - * | 4 | 5 | 6 | 7 | be_packed[1] - * ------------------------- - * ... - * _________________________ - * | 20 | 21 | 22 | 23 | be_packed[5] - * ------------------------- - * - * Convert to the sequence they would appear in the ibm,associativity property. - */ -int vphn_unpack_associativity(const long *packed, __be32 *unpacked) -{ - __be64 be_packed[VPHN_REGISTER_COUNT]; - int i, nr_assoc_doms = 0; - const __be16 *field = (const __be16 *) be_packed; - u16 last = 0; - bool is_32bit = false; - -#define VPHN_FIELD_UNUSED (0xffff) -#define VPHN_FIELD_MSB (0x8000) -#define VPHN_FIELD_MASK (~VPHN_FIELD_MSB) - - /* Let's fix the values returned by plpar_hcall9() */ - for (i = 0; i < VPHN_REGISTER_COUNT; i++) - be_packed[i] = cpu_to_be64(packed[i]); - - for (i = 1; i < VPHN_ASSOC_BUFSIZE; i++) { - u16 new = be16_to_cpup(field++); - - if (is_32bit) { - /* - * Let's concatenate the 16 bits of this field to the - * 15 lower bits of the previous field - */ - unpacked[++nr_assoc_doms] = - cpu_to_be32(last << 16 | new); - is_32bit = false; - } else if (new == VPHN_FIELD_UNUSED) - /* This is the list terminator */ - break; - else if (new & VPHN_FIELD_MSB) { - /* Data is in the lower 15 bits of this field */ - unpacked[++nr_assoc_doms] = - cpu_to_be32(new & VPHN_FIELD_MASK); - } else { - /* - * Data is in the lower 15 bits of this field - * concatenated with the next 16 bit field - */ - last = new; - is_32bit = true; - } - } - - /* The first cell contains the length of the property */ - unpacked[0] = cpu_to_be32(nr_assoc_doms); - - return nr_assoc_doms; -} |