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-rw-r--r--arch/arm/mach-prima2/platsmp.c123
1 files changed, 0 insertions, 123 deletions
diff --git a/arch/arm/mach-prima2/platsmp.c b/arch/arm/mach-prima2/platsmp.c
deleted file mode 100644
index 8f7bbb57fb20..000000000000
--- a/arch/arm/mach-prima2/platsmp.c
+++ /dev/null
@@ -1,123 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * plat smp support for CSR Marco dual-core SMP SoCs
- *
- * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/delay.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <asm/page.h>
-#include <asm/mach/map.h>
-#include <asm/smp_plat.h>
-#include <asm/smp_scu.h>
-#include <asm/cacheflush.h>
-#include <asm/cputype.h>
-
-#include "common.h"
-
-static void __iomem *clk_base;
-
-static DEFINE_SPINLOCK(boot_lock);
-
-/* XXX prima2_pen_release is cargo culted code - DO NOT COPY XXX */
-volatile int prima2_pen_release = -1;
-
-static void sirfsoc_secondary_init(unsigned int cpu)
-{
- /*
- * let the primary processor know we're out of the
- * pen, then head off into the C entry point
- */
- prima2_pen_release = -1;
- smp_wmb();
-
- /*
- * Synchronise with the boot thread.
- */
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
-}
-
-static const struct of_device_id clk_ids[] = {
- { .compatible = "sirf,atlas7-clkc" },
- {},
-};
-
-static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
- unsigned long timeout;
- struct device_node *np;
-
- np = of_find_matching_node(NULL, clk_ids);
- if (!np)
- return -ENODEV;
-
- clk_base = of_iomap(np, 0);
- if (!clk_base)
- return -ENOMEM;
-
- /*
- * write the address of secondary startup into the clkc register
- * at offset 0x2bC, then write the magic number 0x3CAF5D62 to the
- * clkc register at offset 0x2b8, which is what boot rom code is
- * waiting for. This would wake up the secondary core from WFE
- */
-#define SIRFSOC_CPU1_JUMPADDR_OFFSET 0x2bc
- __raw_writel(__pa_symbol(sirfsoc_secondary_startup),
- clk_base + SIRFSOC_CPU1_JUMPADDR_OFFSET);
-
-#define SIRFSOC_CPU1_WAKEMAGIC_OFFSET 0x2b8
- __raw_writel(0x3CAF5D62,
- clk_base + SIRFSOC_CPU1_WAKEMAGIC_OFFSET);
-
- /* make sure write buffer is drained */
- mb();
-
- spin_lock(&boot_lock);
-
- /*
- * The secondary processor is waiting to be released from
- * the holding pen - release it, then wait for it to flag
- * that it has been released by resetting prima2_pen_release.
- *
- * Note that "prima2_pen_release" is the hardware CPU ID, whereas
- * "cpu" is Linux's internal ID.
- */
- prima2_pen_release = cpu_logical_map(cpu);
- sync_cache_w(&prima2_pen_release);
-
- /*
- * Send the secondary CPU SEV, thereby causing the boot monitor to read
- * the JUMPADDR and WAKEMAGIC, and branch to the address found there.
- */
- dsb_sev();
-
- timeout = jiffies + (1 * HZ);
- while (time_before(jiffies, timeout)) {
- smp_rmb();
- if (prima2_pen_release == -1)
- break;
-
- udelay(10);
- }
-
- /*
- * now the secondary core is starting up let it run its
- * calibrations, then wait for it to finish
- */
- spin_unlock(&boot_lock);
-
- return prima2_pen_release != -1 ? -ENOSYS : 0;
-}
-
-const struct smp_operations sirfsoc_smp_ops __initconst = {
- .smp_secondary_init = sirfsoc_secondary_init,
- .smp_boot_secondary = sirfsoc_boot_secondary,
-#ifdef CONFIG_HOTPLUG_CPU
- .cpu_die = sirfsoc_cpu_die,
-#endif
-};