diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/kernel/flat.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/kernel/flat.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/kernel/flat.c b/target/linux/ubicom32/files/arch/ubicom32/kernel/flat.c deleted file mode 100644 index e8eb459..0000000 --- a/target/linux/ubicom32/files/arch/ubicom32/kernel/flat.c +++ /dev/null @@ -1,206 +0,0 @@ -/* - * arch/ubicom32/kernel/flat.c - * Ubicom32 architecture flat executable format support. - * - * (C) Copyright 2009, Ubicom, Inc. - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port is free software: you can redistribute - * it and/or modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, either version 2 of the - * License, or (at your option) any later version. - * - * The Ubicom32 Linux Kernel Port is distributed in the hope that it - * will be useful, but WITHOUT ANY WARRANTY; without even the implied - * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - */ -#include <linux/module.h> -#include <linux/types.h> -#include <linux/flat.h> - -unsigned long ubicom32_flat_get_addr_from_rp(unsigned long *rp, - u32_t relval, - u32_t flags, - unsigned long *persistent) -{ - u32_t relval_reloc_type = relval >> 27; - u32_t insn = *rp; - - if (*persistent) { - /* - * relval holds the relocation that has to be adjusted. - */ - if (relval == 0) { - *persistent = 0; - } - - return relval; - } - - if (relval_reloc_type == R_UBICOM32_32) { - /* - * insn holds the relocation - */ - return insn; - } - - /* - * We don't know this one. - */ - return 0; -} - -void ubicom32_flat_put_addr_at_rp(unsigned long *rp, - u32_t val, - u32_t relval, - unsigned long *persistent) -{ - u32_t reloc_type = (relval >> 27) & 0x1f; - u32_t insn = *rp; - - /* - * If persistent is set then it contains the relocation type. - */ - if (*persistent) { - /* - * If persistent is set then it contains the relocation type. - */ - reloc_type = (*persistent >> 27) & 0x1f; - } - - switch (reloc_type) { - case R_UBICOM32_32: - /* - * Store the 32 bits as is. - */ - *rp = val; - break; - case R_UBICOM32_HI24: - { - /* - * 24 bit relocation that is part of the MOVEAI - * instruction. The 24 bits come from bits 7 - 30 of the - * relocation. The 24 bits eventually get split into 2 - * fields in the instruction encoding. - * - * - Bits 7 - 27 of the relocation are encoded into bits - * 0 - 20 of the instruction. - * - * - Bits 28 - 30 of the relocation are encoded into bit - * 24 - 26 of the instruction. - */ - u32_t mask = 0x1fffff | (0x7 << 24); - u32_t valid24bits = (val >> 7) & 0xffffff; - u32_t bot_21 = valid24bits & 0x1fffff; - u32_t upper_3_bits = ((valid24bits & 0xe00000) << 3); - insn &= ~mask; - - insn |= bot_21; - insn |= upper_3_bits; - *rp = insn; - } - break; - case R_UBICOM32_LO7_S: - case R_UBICOM32_LO7_2_S: - case R_UBICOM32_LO7_4_S: - { - /* - * Bits 0 - 6 of the relocation are encoded into the - * 7bit unsigned immediate fields of the SOURCE-1 field - * of the instruction. The immediate value is left - * shifted by (0, 1, 2) based on the operand size. - */ - u32_t mask = 0x1f | (0x3 << 8); - u32_t bottom, top; - val &= 0x7f; - if (reloc_type == R_UBICOM32_LO7_2_S) { - val >>= 1; - } else if (reloc_type == R_UBICOM32_LO7_4_S) { - val >>= 2; - } - - bottom = val & 0x1f; - top = val >> 5; - insn &= ~mask; - insn |= bottom; - insn |= (top << 8); - BUG_ON(*rp != insn); - *rp = insn; - break; - } - case R_UBICOM32_LO7_D: - case R_UBICOM32_LO7_2_D: - case R_UBICOM32_LO7_4_D: - { - /* - * Bits 0 - 6 of the relocation are encoded into the - * 7bit unsigned immediate fields of the DESTINATION - * field of the instruction. The immediate value is - * left shifted by (0, 1, 2) based on the operand size. - */ - u32_t mask = (0x1f | (0x3 << 8)) << 16; - u32_t bottom, top; - val &= 0x7f; - if (reloc_type == R_UBICOM32_LO7_2_D) { - val >>= 1; - } else if (reloc_type == R_UBICOM32_LO7_4_D) { - val >>= 2; - } - bottom = (val & 0x1f) << 16; - top = (val >> 5) << 16; - insn &= ~mask; - insn |= bottom; - insn |= (top << 8); - BUG_ON(*rp != insn); - *rp = insn; - break; - } - case R_UBICOM32_LO7_CALLI: - case R_UBICOM32_LO16_CALLI: - { - /* - * Extract the offset for a CALLI instruction. The - * offsets can be either 7 bits or 18 bits. Since all - * instructions in ubicom32 architecture are at work - * aligned addresses the truncated offset is right - * shifted by 2 before being encoded in the instruction. - */ - if (reloc_type == R_UBICOM32_LO7_CALLI) { - val &= 0x7f; - } else { - val &= 0x3ffff; - } - - val >>= 2; - - insn &= ~0x071f071f; - insn |= (val & 0x1f) << 0; - val >>= 5; - insn |= (val & 0x07) << 8; - val >>= 3; - insn |= (val & 0x1f) << 16; - val >>= 5; - insn |= (val & 0x07) << 24; - if (reloc_type == R_UBICOM32_LO7_CALLI) { - BUG_ON(*rp != insn); - } - *rp = insn; - } - break; - } - - if (*persistent) { - *persistent = 0; - } -} |