5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
82 lines
1.5 KiB
ArmAsm
82 lines
1.5 KiB
ArmAsm
; 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 CONFIG_C6X_BIG_KERNEL
|
|
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 CONFIG_C6X_BIG_KERNEL
|
|
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
|