2 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0+
7 #include <asm-offsets.h>
9 #include <linux/linkage.h>
10 #include <asm/arcregs.h>
13 ; ARCompact devices are not supposed to be SMP so master/slave check
15 #ifdef CONFIG_ISA_ARCV2
16 ; Non-masters will be halted immediately, they might be kicked later
17 ; by platform code right before passing control to the Linux kernel
18 ; in bootm.c:boot_jump_linux().
33 /* Setup interrupt vector base that matches "__text_start" */
34 sr __ivt_start, [ARC_AUX_INTR_VEC_BASE]
36 ; Disable/enable I-cache according to configuration
37 lr r5, [ARC_BCR_IC_BUILD]
38 breq r5, 0, 1f ; I$ doesn't exist
39 lr r5, [ARC_AUX_IC_CTRL]
40 #ifndef CONFIG_SYS_ICACHE_OFF
41 bclr r5, r5, 0 ; 0 - Enable, 1 is Disable
43 bset r5, r5, 0 ; I$ exists, but is not used
45 sr r5, [ARC_AUX_IC_CTRL]
48 ; Disable/enable D-cache according to configuration
49 lr r5, [ARC_BCR_DC_BUILD]
50 breq r5, 0, 1f ; D$ doesn't exist
51 lr r5, [ARC_AUX_DC_CTRL]
52 bclr r5, r5, 6 ; Invalidate (discard w/o wback)
53 #ifndef CONFIG_SYS_DCACHE_OFF
54 bclr r5, r5, 0 ; Enable (+Inv)
56 bset r5, r5, 0 ; Disable (+Inv)
58 sr r5, [ARC_AUX_DC_CTRL]
61 #ifdef CONFIG_ISA_ARCV2
62 ; Disable System-Level Cache (SLC)
64 breq r5, 0, 1f ; SLC doesn't exist
65 lr r5, [ARC_AUX_SLC_CTRL]
66 bclr r5, r5, 6 ; Invalidate (discard w/o wback)
67 bclr r5, r5, 0 ; Enable (+Inv)
68 sr r5, [ARC_AUX_SLC_CTRL]
73 /* Establish C runtime stack and frame */
74 mov %sp, CONFIG_SYS_INIT_SP_ADDR
77 /* Allocate reserved area from current top of stack */
79 bl board_init_f_alloc_reserve
80 /* Set stack below reserved area, adjust frame pointer accordingly */
84 /* Initialize reserved area - note: r0 already contains address */
85 bl board_init_f_init_reserve
87 /* Zero the one and only argument of "board_init_f" */
93 * void board_init_f_r_trampoline(stack-pointer address)
95 * This "function" does not return, instead it continues in RAM
96 * after relocating the monitor code.
98 * r0 = new stack-pointer
100 ENTRY(board_init_f_r_trampoline)
101 /* Set up the stack- and frame-pointers */
105 /* Update position of intterupt vector table */
106 lr %r0, [ARC_AUX_INTR_VEC_BASE]
107 ld %r1, [%r25, GD_RELOC_OFF]
109 sr %r0, [ARC_AUX_INTR_VEC_BASE]
111 /* Re-enter U-Boot by calling board_init_f_r */
113 ENDPROC(board_init_f_r_trampoline)