bmips.h
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2011 by Kevin Cernekee (cernekee@gmail.com)
*
* Definitions for BMIPS processors
*/
#ifndef _ASM_BMIPS_H
#define _ASM_BMIPS_H
#include <linux/compiler.h>
#include <linux/linkage.h>
#include <asm/addrspace.h>
#include <asm/mipsregs.h>
#include <asm/hazards.h>
/* NOTE: the CBR register returns a PA, and it can be above 0xff00_0000 */
#define BMIPS_GET_CBR() ((void __iomem *)(CKSEG1 | \
(unsigned long) \
((read_c0_brcm_cbr() >> 18) << 18)))
#define BMIPS_RAC_CONFIG 0x00000000
#define BMIPS_RAC_ADDRESS_RANGE 0x00000004
#define BMIPS_RAC_CONFIG_1 0x00000008
#define BMIPS_L2_CONFIG 0x0000000c
#define BMIPS_LMB_CONTROL 0x0000001c
#define BMIPS_SYSTEM_BASE 0x00000020
#define BMIPS_PERF_GLOBAL_CONTROL 0x00020000
#define BMIPS_PERF_CONTROL_0 0x00020004
#define BMIPS_PERF_CONTROL_1 0x00020008
#define BMIPS_PERF_COUNTER_0 0x00020010
#define BMIPS_PERF_COUNTER_1 0x00020014
#define BMIPS_PERF_COUNTER_2 0x00020018
#define BMIPS_PERF_COUNTER_3 0x0002001c
#define BMIPS_RELO_VECTOR_CONTROL_0 0x00030000
#define BMIPS_RELO_VECTOR_CONTROL_1 0x00038000
#define BMIPS_NMI_RESET_VEC 0x80000000
#define BMIPS_WARM_RESTART_VEC 0x80000380
#define ZSCM_REG_BASE 0x97000000
#if !defined(__ASSEMBLY__)
#include <linux/cpumask.h>
#include <asm/r4kcache.h>
#include <asm/smp-ops.h>
extern struct plat_smp_ops bmips43xx_smp_ops;
extern struct plat_smp_ops bmips5000_smp_ops;
static inline int register_bmips_smp_ops(void)
{
#if IS_ENABLED(CONFIG_CPU_BMIPS) && IS_ENABLED(CONFIG_SMP)
switch (current_cpu_type()) {
case CPU_BMIPS32:
case CPU_BMIPS3300:
return register_up_smp_ops();
case CPU_BMIPS4350:
case CPU_BMIPS4380:
register_smp_ops(&bmips43xx_smp_ops);
break;
case CPU_BMIPS5000:
register_smp_ops(&bmips5000_smp_ops);
break;
default:
return -ENODEV;
}
return 0;
#else
return -ENODEV;
#endif
}
extern char bmips_reset_nmi_vec;
extern char bmips_reset_nmi_vec_end;
extern char bmips_smp_movevec;
extern char bmips_smp_int_vec;
extern char bmips_smp_int_vec_end;
extern int bmips_smp_enabled;
extern int bmips_cpu_offset;
extern cpumask_t bmips_booted_mask;
extern unsigned long bmips_tp1_irqs;
extern void bmips_ebase_setup(void);
extern asmlinkage void plat_wired_tlb_setup(void);
static inline unsigned long bmips_read_zscm_reg(unsigned int offset)
{
unsigned long ret;
barrier();
cache_op(Index_Load_Tag_S, ZSCM_REG_BASE + offset);
__sync();
_ssnop();
_ssnop();
_ssnop();
_ssnop();
_ssnop();
_ssnop();
_ssnop();
ret = read_c0_ddatalo();
_ssnop();
return ret;
}
static inline void bmips_write_zscm_reg(unsigned int offset, unsigned long data)
{
write_c0_ddatalo(data);
_ssnop();
_ssnop();
_ssnop();
cache_op(Index_Store_Tag_S, ZSCM_REG_BASE + offset);
_ssnop();
_ssnop();
_ssnop();
barrier();
}
static inline void bmips_post_dma_flush(struct device *dev)
{
void __iomem *cbr = BMIPS_GET_CBR();
u32 cfg;
if (boot_cpu_type() != CPU_BMIPS3300 &&
boot_cpu_type() != CPU_BMIPS4350 &&
boot_cpu_type() != CPU_BMIPS4380)
return;
/* Flush stale data out of the readahead cache */
cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG);
__raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
__raw_readl(cbr + BMIPS_RAC_CONFIG);
}
#endif /* !defined(__ASSEMBLY__) */
#endif /* _ASM_BMIPS_H */