1; SPDX-License-Identifier: GPL-2.0-only 2; 3; Port on Texas Instruments TMS320C6x architecture 4; 5; Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated 6; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) 7; 8#include <linux/linkage.h> 9#include <linux/of_fdt.h> 10#include <asm/asm-offsets.h> 11 12 __HEAD 13ENTRY(_c_int00) 14 ;; Save magic and pointer 15 MV .S1 A4,A10 16 MV .S2 B4,B10 17 MVKL .S2 __bss_start,B5 18 MVKH .S2 __bss_start,B5 19 MVKL .S2 __bss_stop,B6 20 MVKH .S2 __bss_stop,B6 21 SUB .L2 B6,B5,B6 ; bss size 22 23 ;; Set the stack pointer 24 MVKL .S2 current_ksp,B0 25 MVKH .S2 current_ksp,B0 26 LDW .D2T2 *B0,B15 27 28 ;; clear bss 29 SHR .S2 B6,3,B0 ; number of dwords to clear 30 ZERO .L2 B13 31 ZERO .L2 B12 32bss_loop: 33 BDEC .S2 bss_loop,B0 34 NOP 3 35 CMPLT .L2 B0,0,B1 36 [!B1] STDW .D2T2 B13:B12,*B5++[1] 37 38 NOP 4 39 AND .D2 ~7,B15,B15 40 41 ;; Clear GIE and PGIE 42 MVC .S2 CSR,B2 43 CLR .S2 B2,0,1,B2 44 MVC .S2 B2,CSR 45 MVC .S2 TSR,B2 46 CLR .S2 B2,0,1,B2 47 MVC .S2 B2,TSR 48 MVC .S2 ITSR,B2 49 CLR .S2 B2,0,1,B2 50 MVC .S2 B2,ITSR 51 MVC .S2 NTSR,B2 52 CLR .S2 B2,0,1,B2 53 MVC .S2 B2,NTSR 54 55 ;; pass DTB pointer to machine_init (or zero if none) 56 MVKL .S1 OF_DT_HEADER,A0 57 MVKH .S1 OF_DT_HEADER,A0 58 CMPEQ .L1 A10,A0,A0 59 [A0] MV .S1X B10,A4 60 [!A0] MVK .S1 0,A4 61 62#ifdef CONFIG_C6X_BIG_KERNEL 63 MVKL .S1 machine_init,A0 64 MVKH .S1 machine_init,A0 65 B .S2X A0 66 ADDKPC .S2 0f,B3,4 670: 68#else 69 CALLP .S2 machine_init,B3 70#endif 71 72 ;; Jump to Linux init 73#ifdef CONFIG_C6X_BIG_KERNEL 74 MVKL .S1 start_kernel,A0 75 MVKH .S1 start_kernel,A0 76 B .S2X A0 77#else 78 B .S2 start_kernel 79#endif 80 NOP 5 81L1: BNOP .S2 L1,5 82