5f7dc5d750
Unlike other alphas, marvel doesn't have real PC-style CMOS clock hardware - RTC accesses are emulated via PAL calls. Unfortunately, for unknown reason these calls work only on CPU #0. So current implementation for arbitrary CPU makes CMOS_READ/WRITE to be executed on CPU #0 via IPI. However, for obvious reason this doesn't work with standard get/set_rtc_time() functions, where a bunch of CMOS accesses is done with disabled interrupts. Solved by making the IPI calls for entire get/set_rtc_time() functions, not for individual CMOS accesses. Which is also a lot more effective performance-wise. The patch is largely based on the code from Jay Estabrook. My changes: - tweak asm-generic/rtc.h by adding a couple of #defines to avoid a massive code duplication in arch/alpha/include/asm/rtc.h; - sys_marvel.c: fix get/set_rtc_time() return values (Jay's FIXMEs). NOTE: this fixes *only* LIB_RTC drivers. Legacy (CONFIG_RTC) driver wont't work on marvel. Actually I think that we should just disable CONFIG_RTC on alpha (maybe in 2.6.30?), like most other arches - AFAIK, all modern distributions use LIB_RTC anyway. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
#ifndef __ALPHA_MACHVEC_H
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#define __ALPHA_MACHVEC_H 1
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#include <linux/types.h>
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/*
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* This file gets pulled in by asm/io.h from user space. We don't
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* want most of this escaping.
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*/
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#ifdef __KERNEL__
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/* The following structure vectors all of the I/O and IRQ manipulation
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from the generic kernel to the hardware specific backend. */
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struct task_struct;
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struct mm_struct;
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struct vm_area_struct;
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struct linux_hose_info;
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struct pci_dev;
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struct pci_ops;
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struct pci_controller;
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struct _alpha_agp_info;
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struct rtc_time;
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struct alpha_machine_vector
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{
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/* This "belongs" down below with the rest of the runtime
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variables, but it is convenient for entry.S if these
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two slots are at the beginning of the struct. */
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unsigned long hae_cache;
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unsigned long *hae_register;
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int nr_irqs;
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int rtc_port;
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unsigned int max_asn;
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unsigned long max_isa_dma_address;
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unsigned long irq_probe_mask;
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unsigned long iack_sc;
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unsigned long min_io_address;
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unsigned long min_mem_address;
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unsigned long pci_dac_offset;
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void (*mv_pci_tbi)(struct pci_controller *hose,
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dma_addr_t start, dma_addr_t end);
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unsigned int (*mv_ioread8)(void __iomem *);
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unsigned int (*mv_ioread16)(void __iomem *);
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unsigned int (*mv_ioread32)(void __iomem *);
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void (*mv_iowrite8)(u8, void __iomem *);
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void (*mv_iowrite16)(u16, void __iomem *);
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void (*mv_iowrite32)(u32, void __iomem *);
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u8 (*mv_readb)(const volatile void __iomem *);
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u16 (*mv_readw)(const volatile void __iomem *);
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u32 (*mv_readl)(const volatile void __iomem *);
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u64 (*mv_readq)(const volatile void __iomem *);
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void (*mv_writeb)(u8, volatile void __iomem *);
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void (*mv_writew)(u16, volatile void __iomem *);
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void (*mv_writel)(u32, volatile void __iomem *);
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void (*mv_writeq)(u64, volatile void __iomem *);
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void __iomem *(*mv_ioportmap)(unsigned long);
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void __iomem *(*mv_ioremap)(unsigned long, unsigned long);
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void (*mv_iounmap)(volatile void __iomem *);
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int (*mv_is_ioaddr)(unsigned long);
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int (*mv_is_mmio)(const volatile void __iomem *);
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void (*mv_switch_mm)(struct mm_struct *, struct mm_struct *,
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struct task_struct *);
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void (*mv_activate_mm)(struct mm_struct *, struct mm_struct *);
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void (*mv_flush_tlb_current)(struct mm_struct *);
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void (*mv_flush_tlb_current_page)(struct mm_struct * mm,
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struct vm_area_struct *vma,
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unsigned long addr);
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void (*update_irq_hw)(unsigned long, unsigned long, int);
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void (*ack_irq)(unsigned long);
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void (*device_interrupt)(unsigned long vector);
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void (*machine_check)(u64 vector, u64 la);
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void (*smp_callin)(void);
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void (*init_arch)(void);
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void (*init_irq)(void);
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void (*init_rtc)(void);
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void (*init_pci)(void);
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void (*kill_arch)(int);
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u8 (*pci_swizzle)(struct pci_dev *, u8 *);
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int (*pci_map_irq)(struct pci_dev *, u8, u8);
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struct pci_ops *pci_ops;
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struct _alpha_agp_info *(*agp_info)(void);
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unsigned int (*rtc_get_time)(struct rtc_time *);
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int (*rtc_set_time)(struct rtc_time *);
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const char *vector_name;
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/* NUMA information */
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int (*pa_to_nid)(unsigned long);
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int (*cpuid_to_nid)(int);
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unsigned long (*node_mem_start)(int);
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unsigned long (*node_mem_size)(int);
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/* System specific parameters. */
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union {
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struct {
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unsigned long gru_int_req_bits;
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} cia;
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struct {
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unsigned long gamma_bias;
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} t2;
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struct {
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unsigned int route_tab;
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} sio;
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} sys;
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};
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extern struct alpha_machine_vector alpha_mv;
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#ifdef CONFIG_ALPHA_GENERIC
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extern int alpha_using_srm;
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#else
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#ifdef CONFIG_ALPHA_SRM
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#define alpha_using_srm 1
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#else
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#define alpha_using_srm 0
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#endif
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#endif /* GENERIC */
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#endif
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#endif /* __ALPHA_MACHVEC_H */
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