cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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leon.h (7844B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2004 Konrad Eisele (eiselekd@web.de,konrad@gaisler.com) Gaisler Research
      4 * Copyright (C) 2004 Stefan Holst (mail@s-holst.de) Uni-Stuttgart
      5 * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
      6 * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
      7 */
      8
      9#ifndef LEON_H_INCLUDE
     10#define LEON_H_INCLUDE
     11
     12/* mmu register access, ASI_LEON_MMUREGS */
     13#define LEON_CNR_CTRL		0x000
     14#define LEON_CNR_CTXP		0x100
     15#define LEON_CNR_CTX		0x200
     16#define LEON_CNR_F		0x300
     17#define LEON_CNR_FADDR		0x400
     18
     19#define LEON_CNR_CTX_NCTX	256	/*number of MMU ctx */
     20
     21#define LEON_CNR_CTRL_TLBDIS	0x80000000
     22
     23#define LEON_MMUTLB_ENT_MAX	64
     24
     25/*
     26 * diagnostic access from mmutlb.vhd:
     27 * 0: pte address
     28 * 4: pte
     29 * 8: additional flags
     30 */
     31#define LEON_DIAGF_LVL		0x3
     32#define LEON_DIAGF_WR		0x8
     33#define LEON_DIAGF_WR_SHIFT	3
     34#define LEON_DIAGF_HIT		0x10
     35#define LEON_DIAGF_HIT_SHIFT	4
     36#define LEON_DIAGF_CTX		0x1fe0
     37#define LEON_DIAGF_CTX_SHIFT	5
     38#define LEON_DIAGF_VALID	0x2000
     39#define LEON_DIAGF_VALID_SHIFT	13
     40
     41/* irq masks */
     42#define LEON_HARD_INT(x)	(1 << (x))	/* irq 0-15 */
     43#define LEON_IRQMASK_R		0x0000fffe	/* bit 15- 1 of lregs.irqmask */
     44#define LEON_IRQPRIO_R		0xfffe0000	/* bit 31-17 of lregs.irqmask */
     45
     46#define LEON_MCFG2_SRAMDIS		0x00002000
     47#define LEON_MCFG2_SDRAMEN		0x00004000
     48#define LEON_MCFG2_SRAMBANKSZ		0x00001e00	/* [12-9] */
     49#define LEON_MCFG2_SRAMBANKSZ_SHIFT	9
     50#define LEON_MCFG2_SDRAMBANKSZ		0x03800000	/* [25-23] */
     51#define LEON_MCFG2_SDRAMBANKSZ_SHIFT	23
     52
     53#define LEON_TCNT0_MASK	0x7fffff
     54
     55
     56#define ASI_LEON3_SYSCTRL		0x02
     57#define ASI_LEON3_SYSCTRL_ICFG		0x08
     58#define ASI_LEON3_SYSCTRL_DCFG		0x0c
     59#define ASI_LEON3_SYSCTRL_CFG_SNOOPING (1 << 27)
     60#define ASI_LEON3_SYSCTRL_CFG_SSIZE(c) (1 << ((c >> 20) & 0xf))
     61
     62#ifndef __ASSEMBLY__
     63
     64/* do a physical address bypass write, i.e. for 0x80000000 */
     65static inline void leon_store_reg(unsigned long paddr, unsigned long value)
     66{
     67	__asm__ __volatile__("sta %0, [%1] %2\n\t" : : "r"(value), "r"(paddr),
     68			     "i"(ASI_LEON_BYPASS) : "memory");
     69}
     70
     71/* do a physical address bypass load, i.e. for 0x80000000 */
     72static inline unsigned long leon_load_reg(unsigned long paddr)
     73{
     74	unsigned long retval;
     75	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
     76			     "=r"(retval) : "r"(paddr), "i"(ASI_LEON_BYPASS));
     77	return retval;
     78}
     79
     80/* macro access for leon_load_reg() and leon_store_reg() */
     81#define LEON3_BYPASS_LOAD_PA(x)	    (leon_load_reg((unsigned long)(x)))
     82#define LEON3_BYPASS_STORE_PA(x, v) (leon_store_reg((unsigned long)(x), (unsigned long)(v)))
     83#define LEON_BYPASS_LOAD_PA(x)      leon_load_reg((unsigned long)(x))
     84#define LEON_BYPASS_STORE_PA(x, v)  leon_store_reg((unsigned long)(x), (unsigned long)(v))
     85
     86void leon_switch_mm(void);
     87void leon_init_IRQ(void);
     88
     89static inline unsigned long sparc_leon3_get_dcachecfg(void)
     90{
     91	unsigned int retval;
     92	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
     93			     "=r"(retval) :
     94			     "r"(ASI_LEON3_SYSCTRL_DCFG),
     95			     "i"(ASI_LEON3_SYSCTRL));
     96	return retval;
     97}
     98
     99/* enable snooping */
    100static inline void sparc_leon3_enable_snooping(void)
    101{
    102	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
    103			  "set 0x800000, %%l2\n\t"
    104			  "or  %%l2, %%l1, %%l2\n\t"
    105			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
    106};
    107
    108static inline int sparc_leon3_snooping_enabled(void)
    109{
    110	u32 cctrl;
    111	__asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl));
    112	return ((cctrl >> 23) & 1) && ((cctrl >> 17) & 1);
    113};
    114
    115static inline void sparc_leon3_disable_cache(void)
    116{
    117	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
    118			  "set 0x00000f, %%l2\n\t"
    119			  "andn  %%l2, %%l1, %%l2\n\t"
    120			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
    121};
    122
    123static inline unsigned long sparc_leon3_asr17(void)
    124{
    125	u32 asr17;
    126	__asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
    127	return asr17;
    128};
    129
    130static inline int sparc_leon3_cpuid(void)
    131{
    132	return sparc_leon3_asr17() >> 28;
    133}
    134
    135#endif /*!__ASSEMBLY__*/
    136
    137#ifdef CONFIG_SMP
    138# define LEON3_IRQ_IPI_DEFAULT		13
    139# define LEON3_IRQ_TICKER		(leon3_gptimer_irq)
    140# define LEON3_IRQ_CROSS_CALL		15
    141#endif
    142
    143#if defined(PAGE_SIZE_LEON_8K)
    144#define LEON_PAGE_SIZE_LEON 1
    145#elif defined(PAGE_SIZE_LEON_16K)
    146#define LEON_PAGE_SIZE_LEON 2)
    147#else
    148#define LEON_PAGE_SIZE_LEON 0
    149#endif
    150
    151#if LEON_PAGE_SIZE_LEON == 0
    152/* [ 8, 6, 6 ] + 12 */
    153#define LEON_PGD_SH    24
    154#define LEON_PGD_M     0xff
    155#define LEON_PMD_SH    18
    156#define LEON_PMD_SH_V  (LEON_PGD_SH-2)
    157#define LEON_PMD_M     0x3f
    158#define LEON_PTE_SH    12
    159#define LEON_PTE_M     0x3f
    160#elif LEON_PAGE_SIZE_LEON == 1
    161/* [ 7, 6, 6 ] + 13 */
    162#define LEON_PGD_SH    25
    163#define LEON_PGD_M     0x7f
    164#define LEON_PMD_SH    19
    165#define LEON_PMD_SH_V  (LEON_PGD_SH-1)
    166#define LEON_PMD_M     0x3f
    167#define LEON_PTE_SH    13
    168#define LEON_PTE_M     0x3f
    169#elif LEON_PAGE_SIZE_LEON == 2
    170/* [ 6, 6, 6 ] + 14 */
    171#define LEON_PGD_SH    26
    172#define LEON_PGD_M     0x3f
    173#define LEON_PMD_SH    20
    174#define LEON_PMD_SH_V  (LEON_PGD_SH-0)
    175#define LEON_PMD_M     0x3f
    176#define LEON_PTE_SH    14
    177#define LEON_PTE_M     0x3f
    178#elif LEON_PAGE_SIZE_LEON == 3
    179/* [ 4, 7, 6 ] + 15 */
    180#define LEON_PGD_SH    28
    181#define LEON_PGD_M     0x0f
    182#define LEON_PMD_SH    21
    183#define LEON_PMD_SH_V  (LEON_PGD_SH-0)
    184#define LEON_PMD_M     0x7f
    185#define LEON_PTE_SH    15
    186#define LEON_PTE_M     0x3f
    187#else
    188#error cannot determine LEON_PAGE_SIZE_LEON
    189#endif
    190
    191#define LEON3_XCCR_SETS_MASK  0x07000000UL
    192#define LEON3_XCCR_SSIZE_MASK 0x00f00000UL
    193
    194#define LEON2_CCR_DSETS_MASK 0x03000000UL
    195#define LEON2_CFG_SSIZE_MASK 0x00007000UL
    196
    197#ifndef __ASSEMBLY__
    198struct vm_area_struct;
    199
    200unsigned long leon_swprobe(unsigned long vaddr, unsigned long *paddr);
    201void leon_flush_icache_all(void);
    202void leon_flush_dcache_all(void);
    203void leon_flush_cache_all(void);
    204void leon_flush_tlb_all(void);
    205extern int leon_flush_during_switch;
    206int leon_flush_needed(void);
    207void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);
    208
    209/* struct that hold LEON3 cache configuration registers */
    210struct leon3_cacheregs {
    211	unsigned long ccr;	/* 0x00 - Cache Control Register  */
    212	unsigned long iccr;     /* 0x08 - Instruction Cache Configuration Register */
    213	unsigned long dccr;	/* 0x0c - Data Cache Configuration Register */
    214};
    215
    216#include <linux/irq.h>
    217#include <linux/interrupt.h>
    218
    219struct device_node;
    220struct task_struct;
    221unsigned int leon_build_device_irq(unsigned int real_irq,
    222				   irq_flow_handler_t flow_handler,
    223				   const char *name, int do_ack);
    224void leon_update_virq_handling(unsigned int virq,
    225			       irq_flow_handler_t flow_handler,
    226			       const char *name, int do_ack);
    227void leon_init_timers(void);
    228void leon_node_init(struct device_node *dp, struct device_node ***nextp);
    229void init_leon(void);
    230void poke_leonsparc(void);
    231void leon3_getCacheRegs(struct leon3_cacheregs *regs);
    232extern int leon3_ticker_irq;
    233
    234#ifdef CONFIG_SMP
    235int leon_smp_nrcpus(void);
    236void leon_clear_profile_irq(int cpu);
    237void leon_smp_done(void);
    238void leon_boot_cpus(void);
    239int leon_boot_one_cpu(int i, struct task_struct *);
    240void leon_init_smp(void);
    241void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
    242irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);
    243
    244extern unsigned int smpleon_ipi[];
    245extern unsigned int linux_trap_ipi15_leon[];
    246extern int leon_ipi_irq;
    247
    248#endif /* CONFIG_SMP */
    249
    250#endif /* __ASSEMBLY__ */
    251
    252/* macros used in leon_mm.c */
    253#define PFN(x)           ((x) >> PAGE_SHIFT)
    254#define _pfn_valid(pfn)	 ((pfn < last_valid_pfn) && (pfn >= PFN(phys_base)))
    255#define _SRMMU_PTE_PMASK_LEON 0xffffffff
    256
    257/*
    258 * On LEON PCI Memory space is mapped 1:1 with physical address space.
    259 *
    260 * I/O space is located at low 64Kbytes in PCI I/O space. The I/O addresses
    261 * are converted into CPU addresses to virtual addresses that are mapped with
    262 * MMU to the PCI Host PCI I/O space window which are translated to the low
    263 * 64Kbytes by the Host controller.
    264 */
    265
    266#endif