diff options
| author | Viresh Kumar <viresh.kumar@st.com> | 2012-04-19 22:23:13 +0530 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-05-14 17:34:05 +0200 |
| commit | e3978dc7dfcb9e7b022bda775929943b43bdefd8 (patch) | |
| tree | c37d37291c0b7df7c3207d2e042d2f1253af2afd /arch/arm/mach-spear13xx/headsmp.S | |
| parent | b31e23726bb9d6cd8848fc539b23330769830110 (diff) | |
SPEAr13xx: Add source files
This patch adds source files for SPEAr13xx Machines.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Diffstat (limited to 'arch/arm/mach-spear13xx/headsmp.S')
| -rw-r--r-- | arch/arm/mach-spear13xx/headsmp.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/mach-spear13xx/headsmp.S b/arch/arm/mach-spear13xx/headsmp.S new file mode 100644 index 000000000000..ed85473a047f --- /dev/null +++ b/arch/arm/mach-spear13xx/headsmp.S @@ -0,0 +1,47 @@ +/* + * arch/arm/mach-spear13XX/headsmp.S + * + * Picked from realview + * Copyright (c) 2012 ST Microelectronics Limited + * Shiraz Hashim <shiraz.hashim@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * spear13xx specific entry point for secondary CPUs. This provides + * a "holding pen" into which all secondary cores are held until we're + * ready for them to initialise. + */ +ENTRY(spear13xx_secondary_startup) + mrc p15, 0, r0, c0, c0, 5 + and r0, r0, #15 + adr r4, 1f + ldmia r4, {r5, r6} + sub r4, r4, r5 + add r6, r6, r4 +pen: ldr r7, [r6] + cmp r7, r0 + bne pen + + /* re-enable coherency */ + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #(1 << 6) | (1 << 0) + mcr p15, 0, r0, c1, c0, 1 + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup + + .align +1: .long . + .long pen_release +ENDPROC(spear13xx_secondary_startup) |