/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015-2016 Socionext Inc.
+ * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#ifdef CONFIG_CACHE_UNIPHIER
int uniphier_cache_init(void);
-int uniphier_cache_l2_is_enabled(void);
-void uniphier_cache_l2_touch_range(unsigned long start, unsigned long end);
-void uniphier_cache_l2_set_locked_ways(u32 way_mask);
#else
static inline int uniphier_cache_init(void)
{
return -ENODEV;
}
-
-static inline int uniphier_cache_l2_is_enabled(void)
-{
- return 0;
-}
-
-static inline void uniphier_cache_l2_touch_range(unsigned long start,
- unsigned long end)
-{
-}
-
-static inline void uniphier_cache_l2_set_locked_ways(u32 way_mask)
-{
-}
#endif
#endif /* __CACHE_UNIPHIER_H */
-obj-$(CONFIG_SMP) += platsmp.o headsmp.o
+obj- += dummy.o
+++ /dev/null
-/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/linkage.h>
-#include <asm/assembler.h>
-#include <asm/cp15.h>
-
-ENTRY(uniphier_smp_trampoline)
-ARM_BE8(setend be) @ ensure we are in BE8 mode
- mrc p15, 0, r0, c0, c0, 5 @ MPIDR (Multiprocessor Affinity Reg)
- and r2, r0, #0x3 @ CPU ID
- ldr r1, uniphier_smp_trampoline_jump
- ldr r3, uniphier_smp_trampoline_poll_addr
- mrc p15, 0, r0, c1, c0, 0 @ SCTLR (System Control Register)
- orr r0, r0, #CR_I @ Enable ICache
- bic r0, r0, #(CR_C | CR_M) @ Disable MMU and Dcache
- mcr p15, 0, r0, c1, c0, 0
- b 1f @ cache the following 5 instructions
-0: wfe
-1: ldr r0, [r3]
- cmp r0, r2
- bxeq r1 @ branch to secondary_startup
- b 0b
- .globl uniphier_smp_trampoline_jump
-uniphier_smp_trampoline_jump:
- .word 0 @ set virt_to_phys(secondary_startup)
- .globl uniphier_smp_trampoline_poll_addr
-uniphier_smp_trampoline_poll_addr:
- .word 0 @ set CPU ID to be kicked to this reg
- .globl uniphier_smp_trampoline_end
-uniphier_smp_trampoline_end:
-ENDPROC(uniphier_smp_trampoline)
+++ /dev/null
-/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#define pr_fmt(fmt) "uniphier: " fmt
-
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/sizes.h>
-#include <asm/cacheflush.h>
-#include <asm/hardware/cache-uniphier.h>
-#include <asm/pgtable.h>
-#include <asm/smp.h>
-#include <asm/smp_scu.h>
-
-/*
- * The secondary CPUs check this register from the boot ROM for the jump
- * destination. After that, it can be reused as a scratch register.
- */
-#define UNIPHIER_SMPCTRL_ROM_RSV2 0x208
-
-static void __iomem *uniphier_smp_rom_boot_rsv2;
-static unsigned int uniphier_smp_max_cpus;
-
-extern char uniphier_smp_trampoline;
-extern char uniphier_smp_trampoline_jump;
-extern char uniphier_smp_trampoline_poll_addr;
-extern char uniphier_smp_trampoline_end;
-
-/*
- * Copy trampoline code to the tail of the 1st section of the page table used
- * in the boot ROM. This area is directly accessible by the secondary CPUs
- * for all the UniPhier SoCs.
- */
-static const phys_addr_t uniphier_smp_trampoline_dest_end = SECTION_SIZE;
-static phys_addr_t uniphier_smp_trampoline_dest;
-
-static int __init uniphier_smp_copy_trampoline(phys_addr_t poll_addr)
-{
- size_t trmp_size;
- static void __iomem *trmp_base;
-
- if (!uniphier_cache_l2_is_enabled()) {
- pr_warn("outer cache is needed for SMP, but not enabled\n");
- return -ENODEV;
- }
-
- uniphier_cache_l2_set_locked_ways(1);
-
- outer_flush_all();
-
- trmp_size = &uniphier_smp_trampoline_end - &uniphier_smp_trampoline;
- uniphier_smp_trampoline_dest = uniphier_smp_trampoline_dest_end -
- trmp_size;
-
- uniphier_cache_l2_touch_range(uniphier_smp_trampoline_dest,
- uniphier_smp_trampoline_dest_end);
-
- trmp_base = ioremap_cache(uniphier_smp_trampoline_dest, trmp_size);
- if (!trmp_base) {
- pr_err("failed to map trampoline destination area\n");
- return -ENOMEM;
- }
-
- memcpy(trmp_base, &uniphier_smp_trampoline, trmp_size);
-
- writel(virt_to_phys(secondary_startup),
- trmp_base + (&uniphier_smp_trampoline_jump -
- &uniphier_smp_trampoline));
-
- writel(poll_addr, trmp_base + (&uniphier_smp_trampoline_poll_addr -
- &uniphier_smp_trampoline));
-
- flush_cache_all(); /* flush out trampoline code to outer cache */
-
- iounmap(trmp_base);
-
- return 0;
-}
-
-static int __init uniphier_smp_prepare_trampoline(unsigned int max_cpus)
-{
- struct device_node *np;
- struct resource res;
- phys_addr_t rom_rsv2_phys;
- int ret;
-
- np = of_find_compatible_node(NULL, NULL, "socionext,uniphier-smpctrl");
- ret = of_address_to_resource(np, 0, &res);
- of_node_put(np);
- if (ret) {
- pr_err("failed to get resource of SMP control\n");
- return ret;
- }
-
- rom_rsv2_phys = res.start + UNIPHIER_SMPCTRL_ROM_RSV2;
-
- ret = uniphier_smp_copy_trampoline(rom_rsv2_phys);
- if (ret)
- return ret;
-
- uniphier_smp_rom_boot_rsv2 = ioremap(rom_rsv2_phys, SZ_4);
- if (!uniphier_smp_rom_boot_rsv2) {
- pr_err("failed to map ROM_BOOT_RSV2 register\n");
- return -ENOMEM;
- }
-
- writel(uniphier_smp_trampoline_dest, uniphier_smp_rom_boot_rsv2);
- asm("sev"); /* Bring up all secondary CPUs to the trampoline code */
-
- uniphier_smp_max_cpus = max_cpus; /* save for later use */
-
- return 0;
-}
-
-static void __init uniphier_smp_unprepare_trampoline(void)
-{
- iounmap(uniphier_smp_rom_boot_rsv2);
-
- if (uniphier_smp_trampoline_dest)
- outer_inv_range(uniphier_smp_trampoline_dest,
- uniphier_smp_trampoline_dest_end);
-
- uniphier_cache_l2_set_locked_ways(0);
-}
-
-static int __init uniphier_smp_enable_scu(void)
-{
- unsigned long scu_base_phys = 0;
- void __iomem *scu_base;
-
- if (scu_a9_has_base())
- scu_base_phys = scu_a9_get_base();
-
- if (!scu_base_phys) {
- pr_err("failed to get scu base\n");
- return -ENODEV;
- }
-
- scu_base = ioremap(scu_base_phys, SZ_128);
- if (!scu_base) {
- pr_err("failed to map scu base\n");
- return -ENOMEM;
- }
-
- scu_enable(scu_base);
- iounmap(scu_base);
-
- return 0;
-}
-
-static void __init uniphier_smp_prepare_cpus(unsigned int max_cpus)
-{
- static cpumask_t only_cpu_0 = { CPU_BITS_CPU0 };
- int ret;
-
- ret = uniphier_smp_prepare_trampoline(max_cpus);
- if (ret)
- goto err;
-
- ret = uniphier_smp_enable_scu();
- if (ret)
- goto err;
-
- return;
-err:
- pr_warn("disabling SMP\n");
- init_cpu_present(&only_cpu_0);
- uniphier_smp_unprepare_trampoline();
-}
-
-static int __init uniphier_smp_boot_secondary(unsigned int cpu,
- struct task_struct *idle)
-{
- if (WARN_ON_ONCE(!uniphier_smp_rom_boot_rsv2))
- return -EFAULT;
-
- writel(cpu, uniphier_smp_rom_boot_rsv2);
- readl(uniphier_smp_rom_boot_rsv2); /* relax */
-
- asm("sev"); /* wake up secondary CPUs sleeping in the trampoline */
-
- if (cpu == uniphier_smp_max_cpus - 1) {
- /* clean up resources if this is the last CPU */
- uniphier_smp_unprepare_trampoline();
- }
-
- return 0;
-}
-
-static const struct smp_operations uniphier_smp_ops __initconst = {
- .smp_prepare_cpus = uniphier_smp_prepare_cpus,
- .smp_boot_secondary = uniphier_smp_boot_secondary,
-};
-CPU_METHOD_OF_DECLARE(uniphier_smp, "socionext,uniphier-smp",
- &uniphier_smp_ops);
/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015-2016 Socionext Inc.
+ * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#define UNIPHIER_SSCOPE_CM_SYNC 0x8 /* sync (drain bufs) */
#define UNIPHIER_SSCOPE_CM_FLUSH_PREFETCH 0x9 /* flush p-fetch buf */
#define UNIPHIER_SSCOQM 0x248 /* Cache Operation Queue Mode */
-#define UNIPHIER_SSCOQM_TID_MASK (0x3 << 21)
-#define UNIPHIER_SSCOQM_TID_LRU_DATA (0x0 << 21)
-#define UNIPHIER_SSCOQM_TID_LRU_INST (0x1 << 21)
-#define UNIPHIER_SSCOQM_TID_WAY (0x2 << 21)
#define UNIPHIER_SSCOQM_S_MASK (0x3 << 17)
#define UNIPHIER_SSCOQM_S_RANGE (0x0 << 17)
#define UNIPHIER_SSCOQM_S_ALL (0x1 << 17)
-#define UNIPHIER_SSCOQM_S_WAY (0x2 << 17)
#define UNIPHIER_SSCOQM_CE BIT(15) /* notify completion */
#define UNIPHIER_SSCOQM_CM_INV 0x0 /* invalidate */
#define UNIPHIER_SSCOQM_CM_CLEAN 0x1 /* clean */
#define UNIPHIER_SSCOQM_CM_FLUSH 0x2 /* flush */
-#define UNIPHIER_SSCOQM_CM_PREFETCH 0x3 /* prefetch to cache */
-#define UNIPHIER_SSCOQM_CM_PREFETCH_BUF 0x4 /* prefetch to pf-buf */
-#define UNIPHIER_SSCOQM_CM_TOUCH 0x5 /* touch */
-#define UNIPHIER_SSCOQM_CM_TOUCH_ZERO 0x6 /* touch to zero */
-#define UNIPHIER_SSCOQM_CM_TOUCH_DIRTY 0x7 /* touch with dirty */
#define UNIPHIER_SSCOQAD 0x24c /* Cache Operation Queue Address */
#define UNIPHIER_SSCOQSZ 0x250 /* Cache Operation Queue Size */
-#define UNIPHIER_SSCOQMASK 0x254 /* Cache Operation Queue Address Mask */
-#define UNIPHIER_SSCOQWN 0x258 /* Cache Operation Queue Way Number */
#define UNIPHIER_SSCOPPQSEF 0x25c /* Cache Operation Queue Set Complete*/
#define UNIPHIER_SSCOPPQSEF_FE BIT(1)
#define UNIPHIER_SSCOPPQSEF_OE BIT(0)
#define UNIPHIER_SSCOLPQS_EST BIT(1)
#define UNIPHIER_SSCOLPQS_QST BIT(0)
-/* Is the touch/pre-fetch destination specified by ways? */
-#define UNIPHIER_SSCOQM_TID_IS_WAY(op) \
- ((op & UNIPHIER_SSCOQM_TID_MASK) == UNIPHIER_SSCOQM_TID_WAY)
/* Is the operation region specified by address range? */
#define UNIPHIER_SSCOQM_S_IS_RANGE(op) \
((op & UNIPHIER_SSCOQM_S_MASK) == UNIPHIER_SSCOQM_S_RANGE)
writel_relaxed(start, data->op_base + UNIPHIER_SSCOQAD);
writel_relaxed(size, data->op_base + UNIPHIER_SSCOQSZ);
}
-
- /* set target ways if needed */
- if (unlikely(UNIPHIER_SSCOQM_TID_IS_WAY(operation)))
- writel_relaxed(data->way_locked_mask,
- data->op_base + UNIPHIER_SSCOQWN);
} while (unlikely(readl_relaxed(data->op_base + UNIPHIER_SSCOPPQSEF) &
(UNIPHIER_SSCOPPQSEF_FE | UNIPHIER_SSCOPPQSEF_OE)));
__uniphier_cache_sync(data);
}
-int __init uniphier_cache_l2_is_enabled(void)
-{
- struct uniphier_cache_data *data;
-
- data = list_first_entry_or_null(&uniphier_cache_list,
- struct uniphier_cache_data, list);
- if (!data)
- return 0;
-
- return !!(readl_relaxed(data->ctrl_base + UNIPHIER_SSCC) &
- UNIPHIER_SSCC_ON);
-}
-
-void __init uniphier_cache_l2_touch_range(unsigned long start,
- unsigned long end)
-{
- struct uniphier_cache_data *data;
-
- data = list_first_entry_or_null(&uniphier_cache_list,
- struct uniphier_cache_data, list);
- if (data)
- __uniphier_cache_maint_range(data, start, end,
- UNIPHIER_SSCOQM_TID_WAY |
- UNIPHIER_SSCOQM_CM_TOUCH);
-}
-
-void __init uniphier_cache_l2_set_locked_ways(u32 way_mask)
-{
- struct uniphier_cache_data *data;
-
- data = list_first_entry_or_null(&uniphier_cache_list,
- struct uniphier_cache_data, list);
- if (data)
- __uniphier_cache_set_locked_ways(data, way_mask);
-}
-
static const struct of_device_id uniphier_cache_match[] __initconst = {
- {
- .compatible = "socionext,uniphier-system-cache",
- },
+ { .compatible = "socionext,uniphier-system-cache" },
{ /* sentinel */ }
};
projects / cascardo / linux.git / commitdiff