2 * Secondary CPU startup routine source file.
4 * Copyright (C) 2009-2014 Texas Instruments, Inc.
7 * Santosh Shilimkar <santosh.shilimkar@ti.com>
9 * Interface functions needed for the SMP. This file is based on arm
10 * realview smp platform.
11 * Copyright (c) 2003 ARM Limited.
13 * This program is free software,you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/linkage.h>
19 #include <linux/init.h>
23 /* Physical address needed since MMU not enabled yet on secondary core */
24 #define AUX_CORE_BOOT0_PA 0x48281800
25 #define API_HYP_ENTRY 0x102
28 * OMAP5 specific entry point for secondary CPU to jump from ROM
29 * code. This routine also provides a holding flag into which
30 * secondary core is held until we're ready for it to initialise.
31 * The primary core will update this flag using a hardware
32 * register AuxCoreBoot0.
34 ENTRY(omap5_secondary_startup)
35 wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
38 mrc p15, 0, r4, c0, c0, 5
43 ENDPROC(omap5_secondary_startup)
45 * Same as omap5_secondary_startup except we call into the ROM to
46 * enable HYP mode first. This is called instead of
47 * omap5_secondary_startup if the primary CPU was put into HYP mode by
50 ENTRY(omap5_secondary_hyp_startup)
51 wait_2: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
54 mrc p15, 0, r4, c0, c0, 5
58 ldr r12, =API_HYP_ENTRY
63 ENDPROC(omap5_secondary_hyp_startup)
65 * OMAP4 specific entry point for secondary CPU to jump from ROM
66 * code. This routine also provides a holding flag into which
67 * secondary core is held until we're ready for it to initialise.
68 * The primary core will update this flag using a hardware
69 * register AuxCoreBoot0.
71 ENTRY(omap4_secondary_startup)
74 smc #0 @ read from AuxCoreBoot0
76 mrc p15, 0, r4, c0, c0, 5
82 * we've been released from the wait loop,secondary_stack
83 * should now contain the SVC stack for this core
86 ENDPROC(omap4_secondary_startup)
88 ENTRY(omap4460_secondary_startup)
89 hold_2: ldr r12,=0x103
91 smc #0 @ read from AuxCoreBoot0
93 mrc p15, 0, r4, c0, c0, 5
99 * GIC distributor control register has changed between
100 * CortexA9 r1pX and r2pX. The Control Register secure
101 * banked version is now composed of 2 bits:
102 * bit 0 == Secure Enable
103 * bit 1 == Non-Secure Enable
104 * The Non-Secure banked register has not changed
105 * Because the ROM Code is based on the r1pX GIC, the CPU1
106 * GIC restoration will cause a problem to CPU0 Non-Secure SW.
107 * The workaround must be:
108 * 1) Before doing the CPU1 wakeup, CPU0 must disable
109 * the GIC distributor
110 * 2) CPU1 must re-enable the GIC distributor on
113 ldr r1, =OMAP44XX_GIC_DIST_BASE
119 * we've been released from the wait loop,secondary_stack
120 * should now contain the SVC stack for this core
123 ENDPROC(omap4460_secondary_startup)