/* ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ /** * @file SPC56ECxx/boot.s * @brief SPC56ECxx boot-related code. * * @addtogroup PPC_BOOT * @{ */ #include "boot.h" #if !defined(__DOXYGEN__) .extern _boot_address .extern __ram_start__ .extern __ram_end__ .extern __ivpr_base__ .extern _unhandled_exception /* BAM record.*/ .section .boot, 16 #if BOOT_USE_VLE .long 0x015A0000 #else .long 0x005A0000 #endif .long _reset_address .align 4 .globl _reset_address .type _reset_address, @function _reset_address: #if BOOT_PERFORM_CORE_INIT e_bl _coreinit #endif e_bl _ivinit #if BOOT_RELOCATE_IN_RAM /* * Image relocation in RAM. */ e_lis r4, __ram_reloc_start__@h e_or2i r4, r4, __ram_reloc_start__@l e_lis r5, __ram_reloc_dest__@h e_or2i r5, r5, __ram_reloc_dest__@l e_lis r6, __ram_reloc_end__@h e_or2i r6, r6, __ram_reloc_end__@l .relloop: se_cmpl r4, r6 se_bge .relend se_lwz r7, 0(r4) se_addi r4, 4 se_stw r7, 0(r5) se_addi r5, 4 se_b .relloop .relend: e_lis r3, _boot_address@h e_or2i r3, _boot_address@l mtctr r3 se_bctrl #else e_b _boot_address #endif #if BOOT_PERFORM_CORE_INIT .align 4 _ramcode: tlbwe se_isync se_blr .align 2 _coreinit: /* * Invalidating all TLBs except TLB0. */ e_lis r3, 0 mtspr 625, r3 /* MAS1 */ mtspr 626, r3 /* MAS2 */ mtspr 627, r3 /* MAS3 */ e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(1))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(2))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(3))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(4))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(5))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(6))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(7))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(8))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(9))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(10))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(11))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(12))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(13))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(14))@h mtspr 624, r3 /* MAS0 */ tlbwe e_lis r3, (MAS0_TBLMAS_TBL | MAS0_ESEL(15))@h mtspr 624, r3 /* MAS0 */ tlbwe /* * TLB1 allocated to internal RAM. */ e_lis r3, TLB1_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB1_MAS1@h e_or2i r3, TLB1_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB1_MAS2@h e_or2i r3, TLB1_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB1_MAS3@h e_or2i r3, TLB1_MAS3@l mtspr 627, r3 /* MAS3 */ tlbwe /* * TLB2 allocated to internal Peripherals Bridge A. */ e_lis r3, TLB2_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB2_MAS1@h e_or2i r3, TLB2_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB2_MAS2@h e_or2i r3, TLB2_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB2_MAS3@h e_or2i r3, TLB2_MAS3@l mtspr 627, r3 /* MAS3 */ tlbwe /* * TLB3 allocated to internal Peripherals Bridge B. */ e_lis r3, TLB3_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB3_MAS1@h e_or2i r3, TLB3_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB3_MAS2@h e_or2i r3, TLB3_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB3_MAS3@h e_or2i r3, TLB3_MAS3@l mtspr 627, r3 /* MAS3 */ tlbwe /* * TLB4 allocated to on-platform peripherals. */ e_lis r3, TLB4_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB4_MAS1@h e_or2i r3, TLB4_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB4_MAS2@h e_or2i r3, TLB4_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB4_MAS3@h e_or2i r3, TLB4_MAS3@l mtspr 627, r3 /* MAS3 */ tlbwe /* * TLB5 allocated to on-platform peripherals. */ e_lis r3, TLB5_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB5_MAS1@h e_or2i r3, TLB5_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB5_MAS2@h e_or2i r3, TLB5_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB5_MAS3@h e_or2i r3, TLB5_MAS3@l mtspr 627, r3 /* MAS3 */ tlbwe /* * RAM clearing, this device requires a write to all RAM location in * order to initialize the ECC detection hardware, this is going to * slow down the startup but there is no way around. */ xor r0, r0, r0 xor r1, r1, r1 xor r2, r2, r2 xor r3, r3, r3 xor r4, r4, r4 xor r5, r5, r5 xor r6, r6, r6 xor r7, r7, r7 xor r8, r8, r8 xor r9, r9, r9 xor r10, r10, r10 xor r11, r11, r11 xor r12, r12, r12 xor r13, r13, r13 xor r14, r14, r14 xor r15, r15, r15 xor r16, r16, r16 xor r17, r17, r17 xor r18, r18, r18 xor r19, r19, r19 xor r20, r20, r20 xor r21, r21, r21 xor r22, r22, r22 xor r23, r23, r23 xor r24, r24, r24 xor r25, r25, r25 xor r26, r26, r26 xor r27, r27, r27 xor r28, r28, r28 xor r29, r29, r29 xor r30, r30, r30 xor r31, r31, r31 e_lis r4, __ram_start__@h e_or2i r4, __ram_start__@l e_lis r5, __ram_end__@h e_or2i r5, __ram_end__@l .cleareccloop: se_cmpl r4, r5 se_bge .cleareccend e_stmw r16, 0(r4) e_addi r4, r4, 64 se_b .cleareccloop .cleareccend: /* * Special function registers clearing, required in order to avoid * possible problems with lockstep mode. */ mtcrf 0xFF, r31 mtspr 9, r31 /* CTR */ mtspr 22, r31 /* DEC */ mtspr 26, r31 /* SRR0-1 */ mtspr 27, r31 mtspr 54, r31 /* DECAR */ mtspr 58, r31 /* CSRR0-1 */ mtspr 59, r31 mtspr 61, r31 /* DEAR */ mtspr 256, r31 /* USPRG0 */ mtspr 272, r31 /* SPRG1-7 */ mtspr 273, r31 mtspr 274, r31 mtspr 275, r31 mtspr 276, r31 mtspr 277, r31 mtspr 278, r31 mtspr 279, r31 mtspr 285, r31 /* TBU */ mtspr 284, r31 /* TBL */ #if 0 mtspr 318, r31 /* DVC1-2 */ mtspr 319, r31 #endif mtspr 562, r31 /* DBCNT */ mtspr 570, r31 /* MCSRR0 */ mtspr 571, r31 /* MCSRR1 */ mtspr 604, r31 /* SPRG8-9 */ mtspr 605, r31 /* * *Finally* the TLB0 is re-allocated to flash, note, the final phase * is executed from RAM. */ e_lis r3, TLB0_MAS0@h mtspr 624, r3 /* MAS0 */ e_lis r3, TLB0_MAS1@h e_or2i r3, TLB0_MAS1@l mtspr 625, r3 /* MAS1 */ e_lis r3, TLB0_MAS2@h e_or2i r3, TLB0_MAS2@l mtspr 626, r3 /* MAS2 */ e_lis r3, TLB0_MAS3@h e_or2i r3, TLB0_MAS3@l mtspr 627, r3 /* MAS3 */ se_mflr r4 e_lis r6, _ramcode@h e_or2i r6, _ramcode@l e_lis r7, 0x40010000@h mtctr r7 se_lwz r3, 0(r6) se_stw r3, 0(r7) se_lwz r3, 4(r6) se_stw r3, 4(r7) se_lwz r3, 8(r6) se_stw r3, 8(r7) se_bctrl mtlr r4 /* * Branch prediction enabled. */ e_li r3, BOOT_BUCSR_DEFAULT mtspr 1013, r3 /* BUCSR */ /* * Cache invalidated and then enabled. */ se_li r3, LICSR1_ICINV mtspr 1011, r3 /* LICSR1 */ .inv: mfspr r3, 1011 /* LICSR1 */ e_andi. r3, r3, LICSR1_ICINV se_bne .inv e_lis r3, BOOT_LICSR1_DEFAULT@h e_or2i r3, BOOT_LICSR1_DEFAULT@l mtspr 1011, r3 /* LICSR1 */ se_blr #endif /* BOOT_PERFORM_CORE_INIT */ /* * Exception vectors initialization. */ .align 4 _ivinit: /* MSR initialization.*/ e_lis r3, BOOT_MSR_DEFAULT@h e_ori r3, r3, BOOT_MSR_DEFAULT@l mtMSR r3 /* IVPR initialization.*/ e_lis r3, __ivpr_base__@h e_or2i r3, __ivpr_base__@l mtIVPR r3 /* IVORs initialization.*/ e_lis r3, _unhandled_exception@h e_or2i r3, _unhandled_exception@l mtspr 400, r3 /* IVOR0-15 */ mtspr 401, r3 mtspr 402, r3 mtspr 403, r3 mtspr 404, r3 mtspr 405, r3 mtspr 406, r3 mtspr 407, r3 mtspr 408, r3 mtspr 409, r3 mtspr 410, r3 mtspr 411, r3 mtspr 412, r3 mtspr 413, r3 mtspr 414, r3 mtspr 415, r3 mtspr 528, r3 /* IVOR32-34 */ mtspr 529, r3 mtspr 530, r3 se_blr #endif /* !defined(__DOXYGEN__) */ /** @} */