; SPDX-License-Identifier: GPL-2.0-only ; ; Port on Texas Instruments TMS320C6x architecture ; ; Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated ; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) ; #include <linux/linkage.h> #include <linux/of_fdt.h> #include <asm/asm-offsets.h> __HEAD ENTRY(_c_int00) ;; Save magic and pointer MV .S1 A4,A10 MV .S2 B4,B10 MVKL .S2 __bss_start,B5 MVKH .S2 __bss_start,B5 MVKL .S2 __bss_stop,B6 MVKH .S2 __bss_stop,B6 SUB .L2 B6,B5,B6 ; bss size ;; Set the stack pointer MVKL .S2 current_ksp,B0 MVKH .S2 current_ksp,B0 LDW .D2T2 *B0,B15 ;; clear bss SHR .S2 B6,3,B0 ; number of dwords to clear ZERO .L2 B13 ZERO .L2 B12 bss_loop: BDEC .S2 bss_loop,B0 NOP 3 CMPLT .L2 B0,0,B1 [!B1] STDW .D2T2 B13:B12,*B5++[1] NOP 4 AND .D2 ~7,B15,B15 ;; Clear GIE and PGIE MVC .S2 CSR,B2 CLR .S2 B2,0,1,B2 MVC .S2 B2,CSR MVC .S2 TSR,B2 CLR .S2 B2,0,1,B2 MVC .S2 B2,TSR MVC .S2 ITSR,B2 CLR .S2 B2,0,1,B2 MVC .S2 B2,ITSR MVC .S2 NTSR,B2 CLR .S2 B2,0,1,B2 MVC .S2 B2,NTSR ;; pass DTB pointer to machine_init (or zero if none) MVKL .S1 OF_DT_HEADER,A0 MVKH .S1 OF_DT_HEADER,A0 CMPEQ .L1 A10,A0,A0 [A0] MV .S1X B10,A4 [!A0] MVK .S1 0,A4 #ifdef [31mCONFIG_C6X_BIG_KERNEL[0m MVKL .S1 machine_init,A0 MVKH .S1 machine_init,A0 B .S2X A0 ADDKPC .S2 0f,B3,4 0: #else CALLP .S2 machine_init,B3 #endif ;; Jump to Linux init #ifdef [31mCONFIG_C6X_BIG_KERNEL[0m MVKL .S1 start_kernel,A0 MVKH .S1 start_kernel,A0 B .S2X A0 #else B .S2 start_kernel #endif NOP 5 L1: BNOP .S2 L1,5 |