litmus-rt.git - The LITMUS^RT kernel.

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author	Marc Zyngier <marc.zyngier@arm.com>	2012-04-27 08:18:42 -0400
committer	Marc Zyngier <marc.zyngier@arm.com>	2012-04-27 08:39:25 -0400
commit	fb8a99f9f6bdc908cbbd2284cee80c709d9f7c03 (patch)
tree	c99ea6cd79714e25e016c7270e5191b0e9dfcd6f /include/linux/blockgroup_lock.h
parent	120f3d6c2309cde8b93310267ed11a9b5aa2aad4 (diff)

ARM: architected timers: remove support for non DT platforms

All mainline platforms using the ARM architected timers are DT only. As such, remove the ad-hoc support that is not longer needed anymore. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

Diffstat (limited to 'include/linux/blockgroup_lock.h')

0 files changed, 0 insertions, 0 deletions

/* * drivers/acpi/resource.c - ACPI device resources interpretation. * * Copyright (C) 2012, Intel Corp. * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * 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. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/acpi.h> #include <linux/device.h> #include <linux/export.h> #include <linux/ioport.h> #include <linux/slab.h> #ifdef CONFIG_X86 #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) #else #define valid_IRQ(i) (true) #endif static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect, bool window) { unsigned long flags = IORESOURCE_MEM; if (len == 0) flags |= IORESOURCE_DISABLED; if (write_protect == ACPI_READ_WRITE_MEMORY) flags |= IORESOURCE_MEM_WRITEABLE; if (window) flags |= IORESOURCE_WINDOW; return flags; } static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, u8 write_protect) { res->start = start; res->end = start + len - 1; res->flags = acpi_dev_memresource_flags(len, write_protect, false); } /** * acpi_dev_resource_memory - Extract ACPI memory resource information. * @ares: Input ACPI resource object. * @res: Output generic resource object. * * Check if the given ACPI resource object represents a memory resource and * if that's the case, use the information in it to populate the generic * resource object pointed to by @res. */ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) { struct acpi_resource_memory24 *memory24; struct acpi_resource_memory32 *memory32; struct acpi_resource_fixed_memory32 *fixed_memory32; switch (ares->type) { case ACPI_RESOURCE_TYPE_MEMORY24: memory24 = &ares->data.memory24; acpi_dev_get_memresource(res, memory24->minimum, memory24->address_length, memory24->write_protect); break; case ACPI_RESOURCE_TYPE_MEMORY32: memory32 = &ares->data.memory32; acpi_dev_get_memresource(res, memory32->minimum, memory32->address_length, memory32->write_protect); break; case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: fixed_memory32 = &ares->data.fixed_memory32; acpi_dev_get_memresource(res, fixed_memory32->address, fixed_memory32->address_length, fixed_memory32->write_protect); break; default: return false; } return true; } EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode, bool window) { int flags = IORESOURCE_IO; if (io_decode == ACPI_DECODE_16) flags |= IORESOURCE_IO_16BIT_ADDR; if (start > end || end >= 0x10003) flags |= IORESOURCE_DISABLED; if (window) flags |= IORESOURCE_WINDOW; return flags; } static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, u8 io_decode) { u64 end = start + len - 1; res->start = start; res->end = end; res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false); } /** * acpi_dev_resource_io - Extract ACPI I/O resource information. * @ares: Input ACPI resource object. * @res: Output generic resource object. * * Check if the given ACPI resource object represents an I/O resource and * if that's the case, use the information in it to populate the generic * resource object pointed to by @res. */ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) { struct acpi_resource_io *io; struct acpi_resource_fixed_io *fixed_io; switch (ares->type) { case ACPI_RESOURCE_TYPE_IO: io = &ares->data.io; acpi_dev_get_ioresource(res, io->minimum, io->address_length, io->io_decode); break; case ACPI_RESOURCE_TYPE_FIXED_IO: fixed_io = &ares->data.fixed_io; acpi_dev_get_ioresource(res, fixed_io->address, fixed_io->address_length, ACPI_DECODE_10); break; default: return false; } return true; } EXPORT_SYMBOL_GPL(acpi_dev_resource_io); /** * acpi_dev_resource_address_space - Extract ACPI address space information. * @ares: Input ACPI resource object. * @res: Output generic resource object. * * Check if the given ACPI resource object represents an address space resource * and if that's the case, use the information in it to populate the generic * resource object pointed to by @res. */ bool acpi_dev_resource_address_space(struct acpi_resource *ares, struct resource *res) { acpi_status status; struct acpi_resource_address64 addr; bool window; u64 len; u8 io_decode; switch (ares->type) { case ACPI_RESOURCE_TYPE_ADDRESS16: case ACPI_RESOURCE_TYPE_ADDRESS32: case ACPI_RESOURCE_TYPE_ADDRESS64: break; default: return false; } status = acpi_resource_to_address64(ares, &addr); if (ACPI_FAILURE(status)) return true; res->start = addr.minimum; res->end = addr.maximum; window = addr.producer_consumer == ACPI_PRODUCER; switch(addr.resource_type) { case ACPI_MEMORY_RANGE: len = addr.maximum - addr.minimum + 1; res->flags = acpi_dev_memresource_flags(len, addr.info.mem.write_protect, window); break; case ACPI_IO_RANGE: io_decode = addr.granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; res->flags = acpi_dev_ioresource_flags(addr.minimum, addr.maximum, io_decode, window); break; case ACPI_BUS_NUMBER_RANGE: res->flags = IORESOURCE_BUS; break; default: res->flags = 0; } return true; } EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); /** * acpi_dev_resource_ext_address_space - Extract ACPI address space information. * @ares: Input ACPI resource object. * @res: Output generic resource object. * * Check if the given ACPI resource object represents an extended address space * resource and if that's the case, use the information in it to populate the * generic resource object pointed to by @res. */ bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, struct resource *res) { struct acpi_resource_extended_address64 *ext_addr; bool window; u64 len; u8 io_decode; if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) return false; ext_addr = &ares->data.ext_address64; res->start = ext_addr->minimum; res->end = ext_addr->maximum; window = ext_addr->producer_consumer == ACPI_PRODUCER; switch(ext_addr->resource_type) { case ACPI_MEMORY_RANGE: len = ext_addr->maximum - ext_addr->minimum + 1; res->flags = acpi_dev_memresource_flags(len, ext_addr->info.mem.write_protect, window); break; case ACPI_IO_RANGE: io_decode = ext_addr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; res->flags = acpi_dev_ioresource_flags(ext_addr->minimum, ext_addr->maximum, io_decode, window); break; case ACPI_BUS_NUMBER_RANGE: res->flags = IORESOURCE_BUS; break; default: res->flags = 0; } return true; } EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); /** * acpi_dev_irq_flags - Determine IRQ resource flags. * @triggering: Triggering type as provided by ACPI. * @polarity: Interrupt polarity as provided by ACPI. * @shareable: Whether or not the interrupt is shareable. */ unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) { unsigned long flags; if (triggering == ACPI_LEVEL_SENSITIVE) flags = polarity == ACPI_ACTIVE_LOW ? IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; else flags = polarity == ACPI_ACTIVE_LOW ? IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; if (shareable == ACPI_SHARED) flags |= IORESOURCE_IRQ_SHAREABLE; return flags | IORESOURCE_IRQ; } EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) { res->start = gsi; res->end = gsi; res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED; } static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, u8 triggering, u8 polarity, u8 shareable) { int irq, p, t; if (!valid_IRQ(gsi)) { acpi_dev_irqresource_disabled(res, gsi); return; } /* * In IO-APIC mode, use overrided attribute. Two reasons: * 1. BIOS bug in DSDT * 2. BIOS uses IO-APIC mode Interrupt Source Override */ if (!acpi_get_override_irq(gsi, &t, &p)) { u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; if (triggering != trig || polarity != pol) { pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, t ? "edge" : "level", p ? "low" : "high"); triggering = trig; polarity = pol; } } res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); irq = acpi_register_gsi(NULL, gsi, triggering, polarity); if (irq >= 0) { res->start = irq; res->end = irq; } else { acpi_dev_irqresource_disabled(res, gsi); } } /** * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. * @ares: Input ACPI resource object. * @index: Index into the array of GSIs represented by the resource. * @res: Output generic resource object. * * Check if the given ACPI resource object represents an interrupt resource * and @index does not exceed the resource's interrupt count (true is returned * in that case regardless of the results of the other checks)). If that's the * case, register the GSI corresponding to @index from the array of interrupts * represented by the resource and populate the generic resource object pointed * to by @res accordingly. If the registration of the GSI is not successful, * IORESOURCE_DISABLED will be set it that object's flags. */ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, struct resource *res) { struct acpi_resource_irq *irq; struct acpi_resource_extended_irq *ext_irq; switch (ares->type) { case ACPI_RESOURCE_TYPE_IRQ: /* * Per spec, only one interrupt per descriptor is allowed in * _CRS, but some firmware violates this, so parse them all. */ irq = &ares->data.irq; if (index >= irq->interrupt_count) { acpi_dev_irqresource_disabled(res, 0); return false; } acpi_dev_get_irqresource(res, irq->interrupts[index], irq->triggering, irq->polarity, irq->sharable); break; case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: ext_irq = &ares->data.extended_irq; if (index >= ext_irq->interrupt_count) { acpi_dev_irqresource_disabled(res, 0); return false; } acpi_dev_get_irqresource(res, ext_irq->interrupts[index], ext_irq->triggering, ext_irq->polarity, ext_irq->sharable); break; default: return false; } return true; } EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); /** * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). * @list: The head of the resource list to free. */ void acpi_dev_free_resource_list(struct list_head *list) { struct resource_list_entry *rentry, *re; list_for_each_entry_safe(rentry, re, list, node) { list_del(&rentry->node); kfree(rentry); } } EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); struct res_proc_context { struct list_head *list; int (*preproc)(struct acpi_resource *, void *); void *preproc_data; int count; int error; }; static acpi_status acpi_dev_new_resource_entry(struct resource *r, struct res_proc_context *c) { struct resource_list_entry *rentry; rentry = kmalloc(sizeof(*rentry), GFP_KERNEL); if (!rentry) { c->error = -ENOMEM; return AE_NO_MEMORY; } rentry->res = *r; list_add_tail(&rentry->node, c->list); c->count++; return AE_OK; } static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, void *context) { struct res_proc_context *c = context; struct resource r; int i; if (c->preproc) { int ret; ret = c->preproc(ares, c->preproc_data); if (ret < 0) { c->error = ret; return AE_CTRL_TERMINATE; } else if (ret > 0) { return AE_OK; } } memset(&r, 0, sizeof(r)); if (acpi_dev_resource_memory(ares, &r) || acpi_dev_resource_io(ares, &r) || acpi_dev_resource_address_space(ares, &r) || acpi_dev_resource_ext_address_space(ares, &r)) return acpi_dev_new_resource_entry(&r, c); for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) { acpi_status status; status = acpi_dev_new_resource_entry(&r, c); if (ACPI_FAILURE(status)) return status; } return AE_OK; } /** * acpi_dev_get_resources - Get current resources of a device. * @adev: ACPI device node to get the resources for. * @list: Head of the resultant list of resources (must be empty). * @preproc: The caller's preprocessing routine. * @preproc_data: Pointer passed to the caller's preprocessing routine. * * Evaluate the _CRS method for the given device node and process its output by * (1) executing the @preproc() rountine provided by the caller, passing the * resource pointer and @preproc_data to it as arguments, for each ACPI resource * returned and (2) converting all of the returned ACPI resources into struct


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