forked from Minki/linux
ef24ba7091
NO_IRQ has been == 0 on powerpc for just over ten years (since commit
0ebfff1491 ("[POWERPC] Add new interrupt mapping core and change
platforms to use it")). It's also 0 on most other arches.
Although it's fairly harmless, every now and then it causes confusion
when a driver is built on powerpc and another arch which doesn't define
NO_IRQ. There's at least 6 definitions of NO_IRQ in drivers/, at least
some of which are to work around that problem.
So we'd like to remove it. This is fairly trivial in the arch code, we
just convert:
if (irq == NO_IRQ) to if (!irq)
if (irq != NO_IRQ) to if (irq)
irq = NO_IRQ; to irq = 0;
return NO_IRQ; to return 0;
And a few other odd cases as well.
At least for now we keep the #define NO_IRQ, because there is driver
code that uses NO_IRQ and the fixes to remove those will go via other
trees.
Note we also change some occurrences in PPC sound drivers, drivers/ps3,
and drivers/macintosh.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
301 lines
9.5 KiB
C
301 lines
9.5 KiB
C
#ifndef _ASM_POWERPC_MACHDEP_H
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#define _ASM_POWERPC_MACHDEP_H
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#ifdef __KERNEL__
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/export.h>
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#include <asm/setup.h>
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/* We export this macro for external modules like Alsa to know if
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* ppc_md.feature_call is implemented or not
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*/
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#define CONFIG_PPC_HAS_FEATURE_CALLS
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struct pt_regs;
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struct pci_bus;
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struct device_node;
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struct iommu_table;
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struct rtc_time;
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struct file;
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struct pci_controller;
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struct kimage;
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struct pci_host_bridge;
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struct machdep_calls {
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char *name;
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#ifdef CONFIG_PPC64
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void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
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unsigned long flags, void *caller);
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void (*iounmap)(volatile void __iomem *token);
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#ifdef CONFIG_PM
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void (*iommu_save)(void);
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void (*iommu_restore)(void);
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#endif
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#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
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unsigned long (*memory_block_size)(void);
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#endif
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#endif /* CONFIG_PPC64 */
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/* Platform set_dma_mask and dma_get_required_mask overrides */
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int (*dma_set_mask)(struct device *dev, u64 dma_mask);
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u64 (*dma_get_required_mask)(struct device *dev);
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int (*probe)(void);
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void (*setup_arch)(void); /* Optional, may be NULL */
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/* Optional, may be NULL. */
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void (*show_cpuinfo)(struct seq_file *m);
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void (*show_percpuinfo)(struct seq_file *m, int i);
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/* Returns the current operating frequency of "cpu" in Hz */
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unsigned long (*get_proc_freq)(unsigned int cpu);
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void (*init_IRQ)(void);
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/* Return an irq, or 0 to indicate there are none pending. */
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unsigned int (*get_irq)(void);
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/* PCI stuff */
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/* Called after allocating resources */
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void (*pcibios_fixup)(void);
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void (*pci_irq_fixup)(struct pci_dev *dev);
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int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
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*bridge);
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/* To setup PHBs when using automatic OF platform driver for PCI */
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int (*pci_setup_phb)(struct pci_controller *host);
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void __noreturn (*restart)(char *cmd);
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void __noreturn (*halt)(void);
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void (*panic)(char *str);
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void (*cpu_die)(void);
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long (*time_init)(void); /* Optional, may be NULL */
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int (*set_rtc_time)(struct rtc_time *);
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void (*get_rtc_time)(struct rtc_time *);
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unsigned long (*get_boot_time)(void);
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unsigned char (*rtc_read_val)(int addr);
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void (*rtc_write_val)(int addr, unsigned char val);
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void (*calibrate_decr)(void);
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void (*progress)(char *, unsigned short);
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/* Interface for platform error logging */
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void (*log_error)(char *buf, unsigned int err_type, int fatal);
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unsigned char (*nvram_read_val)(int addr);
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void (*nvram_write_val)(int addr, unsigned char val);
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ssize_t (*nvram_write)(char *buf, size_t count, loff_t *index);
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ssize_t (*nvram_read)(char *buf, size_t count, loff_t *index);
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ssize_t (*nvram_size)(void);
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void (*nvram_sync)(void);
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/* Exception handlers */
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int (*system_reset_exception)(struct pt_regs *regs);
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int (*machine_check_exception)(struct pt_regs *regs);
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int (*handle_hmi_exception)(struct pt_regs *regs);
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/* Early exception handlers called in realmode */
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int (*hmi_exception_early)(struct pt_regs *regs);
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/* Called during machine check exception to retrive fixup address. */
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bool (*mce_check_early_recovery)(struct pt_regs *regs);
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/* Motherboard/chipset features. This is a kind of general purpose
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* hook used to control some machine specific features (like reset
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* lines, chip power control, etc...).
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*/
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long (*feature_call)(unsigned int feature, ...);
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/* Get legacy PCI/IDE interrupt mapping */
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int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
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/* Get access protection for /dev/mem */
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pgprot_t (*phys_mem_access_prot)(struct file *file,
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unsigned long pfn,
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unsigned long size,
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pgprot_t vma_prot);
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/*
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* Function for waiting for work with reduced power in idle loop;
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* called with interrupts disabled.
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*/
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void (*power_save)(void);
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/* Function to enable performance monitor counters for this
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platform, called once per cpu. */
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void (*enable_pmcs)(void);
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/* Set DABR for this platform, leave empty for default implementation */
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int (*set_dabr)(unsigned long dabr,
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unsigned long dabrx);
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/* Set DAWR for this platform, leave empty for default implementation */
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int (*set_dawr)(unsigned long dawr,
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unsigned long dawrx);
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#ifdef CONFIG_PPC32 /* XXX for now */
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/* A general init function, called by ppc_init in init/main.c.
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May be NULL. */
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void (*init)(void);
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void (*kgdb_map_scc)(void);
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/*
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* optional PCI "hooks"
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*/
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/* Called at then very end of pcibios_init() */
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void (*pcibios_after_init)(void);
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#endif /* CONFIG_PPC32 */
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/* Called in indirect_* to avoid touching devices */
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int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
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/* Called after PPC generic resource fixup to perform
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machine specific fixups */
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void (*pcibios_fixup_resources)(struct pci_dev *);
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/* Called for each PCI bus in the system when it's probed */
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void (*pcibios_fixup_bus)(struct pci_bus *);
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/* Called after scan and before resource survey */
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void (*pcibios_fixup_phb)(struct pci_controller *hose);
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#ifdef CONFIG_PCI_IOV
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void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
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resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
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#endif /* CONFIG_PCI_IOV */
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/* Called to shutdown machine specific hardware not already controlled
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* by other drivers.
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*/
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void (*machine_shutdown)(void);
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#ifdef CONFIG_KEXEC
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void (*kexec_cpu_down)(int crash_shutdown, int secondary);
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/* Called to do what every setup is needed on image and the
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* reboot code buffer. Returns 0 on success.
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* Provide your own (maybe dummy) implementation if your platform
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* claims to support kexec.
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*/
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int (*machine_kexec_prepare)(struct kimage *image);
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/* Called to perform the _real_ kexec.
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* Do NOT allocate memory or fail here. We are past the point of
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* no return.
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*/
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void (*machine_kexec)(struct kimage *image);
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#endif /* CONFIG_KEXEC */
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#ifdef CONFIG_SUSPEND
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/* These are called to disable and enable, respectively, IRQs when
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* entering a suspend state. If NULL, then the generic versions
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* will be called. The generic versions disable/enable the
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* decrementer along with interrupts.
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*/
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void (*suspend_disable_irqs)(void);
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void (*suspend_enable_irqs)(void);
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#endif
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int (*suspend_disable_cpu)(void);
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#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
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ssize_t (*cpu_probe)(const char *, size_t);
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ssize_t (*cpu_release)(const char *, size_t);
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#endif
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#ifdef CONFIG_ARCH_RANDOM
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int (*get_random_seed)(unsigned long *v);
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#endif
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};
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extern void e500_idle(void);
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extern void power4_idle(void);
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extern void power7_idle(void);
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extern void ppc6xx_idle(void);
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extern void book3e_idle(void);
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/*
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* ppc_md contains a copy of the machine description structure for the
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* current platform. machine_id contains the initial address where the
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* description was found during boot.
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*/
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extern struct machdep_calls ppc_md;
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extern struct machdep_calls *machine_id;
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#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
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#define define_machine(name) \
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extern struct machdep_calls mach_##name; \
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EXPORT_SYMBOL(mach_##name); \
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struct machdep_calls mach_##name __machine_desc =
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#define machine_is(name) \
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({ \
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extern struct machdep_calls mach_##name \
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__attribute__((weak)); \
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machine_id == &mach_##name; \
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})
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extern void probe_machine(void);
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#ifdef CONFIG_PPC_PMAC
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/*
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* Power macintoshes have either a CUDA, PMU or SMU controlling
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* system reset, power, NVRAM, RTC.
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*/
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typedef enum sys_ctrler_kind {
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SYS_CTRLER_UNKNOWN = 0,
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SYS_CTRLER_CUDA = 1,
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SYS_CTRLER_PMU = 2,
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SYS_CTRLER_SMU = 3,
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} sys_ctrler_t;
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extern sys_ctrler_t sys_ctrler;
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#endif /* CONFIG_PPC_PMAC */
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static inline void log_error(char *buf, unsigned int err_type, int fatal)
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{
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if (ppc_md.log_error)
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ppc_md.log_error(buf, err_type, fatal);
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}
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#define __define_machine_initcall(mach, fn, id) \
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static int __init __machine_initcall_##mach##_##fn(void) { \
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if (machine_is(mach)) return fn(); \
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return 0; \
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} \
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__define_initcall(__machine_initcall_##mach##_##fn, id);
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#define machine_early_initcall(mach, fn) __define_machine_initcall(mach, fn, early)
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#define machine_core_initcall(mach, fn) __define_machine_initcall(mach, fn, 1)
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#define machine_core_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 1s)
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#define machine_postcore_initcall(mach, fn) __define_machine_initcall(mach, fn, 2)
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#define machine_postcore_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 2s)
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#define machine_arch_initcall(mach, fn) __define_machine_initcall(mach, fn, 3)
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#define machine_arch_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 3s)
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#define machine_subsys_initcall(mach, fn) __define_machine_initcall(mach, fn, 4)
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#define machine_subsys_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 4s)
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#define machine_fs_initcall(mach, fn) __define_machine_initcall(mach, fn, 5)
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#define machine_fs_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 5s)
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#define machine_rootfs_initcall(mach, fn) __define_machine_initcall(mach, fn, rootfs)
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#define machine_device_initcall(mach, fn) __define_machine_initcall(mach, fn, 6)
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#define machine_device_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 6s)
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#define machine_late_initcall(mach, fn) __define_machine_initcall(mach, fn, 7)
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#define machine_late_initcall_sync(mach, fn) __define_machine_initcall(mach, fn, 7s)
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_MACHDEP_H */
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