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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __PLATFORM_H
#define __PLATFORM_H
/* Some fwd declarations for types used further down */
struct phb;
struct pci_device;
struct pci_slot;
struct errorlog;
enum resource_id {
RESOURCE_ID_KERNEL,
RESOURCE_ID_INITRAMFS,
RESOURCE_ID_CAPP,
};
#define RESOURCE_SUBID_NONE 0
#define RESOURCE_SUBID_SUPPORTED 1
/*
* Each platform can provide a set of hooks
* that can affect the generic code
*/
struct platform {
const char *name;
/*
* Probe platform, return true on a match, called before
* any allocation has been performed outside of the heap
* so the platform can perform additional memory reservations
* here if needed.
*
* Only the boot CPU is running at this point and the cpu_thread
* structure for secondaries have not been initialized yet. The
* timebases are not synchronized.
*
* Services available:
*
* - Memory allocations / reservations
* - XSCOM
* - FSI
* - Host Services
*/
bool (*probe)(void);
/*
* This is called right after the secondary processors are brought
* up and the timebases in sync to perform any additional platform
* specific initializations. On FSP based machines, this is where
* the FSP driver is brought up.
*/
void (*init)(void);
/*
* These are used to power down and reboot the machine
*/
int64_t (*cec_power_down)(uint64_t request);
int64_t (*cec_reboot)(void);
/*
* This is called once per PHB before probing. It allows the
* platform to setup some PHB private data that can be used
* later on by calls such as pci_get_slot_info() below. The
* "index" argument is the PHB index within the IO HUB (or
* P8 chip).
*
* This is called before the PHB HW has been initialized.
*/
void (*pci_setup_phb)(struct phb *phb, unsigned int index);
/*
* Called during PCI scan for each device. For bridges, this is
* called before its children are probed. This is called for
* every device and for the PHB itself with a NULL pd though
* typically the implementation will only populate the slot
* info structure for bridge ports
*/
void (*pci_get_slot_info)(struct phb *phb,
struct pci_device *pd);
/*
* Called after PCI probe is complete and before inventory is
* displayed in console. This can either run platform fixups or
* can be used to send the inventory to a service processor.
*/
void (*pci_probe_complete)(void);
/*
* If the above is set to skiboot, the handler is here
*/
void (*external_irq)(unsigned int chip_id);
/*
* nvram ops.
*
* Note: To keep the FSP driver simple, we only ever read the
* whole nvram once at boot and we do this passing a dst buffer
* that is 4K aligned. The read is asynchronous, the backend
* must call nvram_read_complete() when done (it's allowed to
* do it recursively from nvram_read though).
*/
int (*nvram_info)(uint32_t *total_size);
int (*nvram_start_read)(void *dst, uint32_t src,
uint32_t len);
int (*nvram_write)(uint32_t dst, void *src, uint32_t len);
/*
* OCC timeout. This return how long we should wait for the OCC
* before timing out. This lets us use a high value on larger FSP
* machines and cut it off completely on BML boots and OpenPower
* machines without pre-existing OCC firmware. Returns a value in
* seconds.
*/
uint32_t (*occ_timeout)(void);
int (*elog_commit)(struct errorlog *buf);
/*
* Initiate loading an external resource (e.g. kernel payload, OCC)
* into a preallocated buffer.
* This is designed to asynchronously load external resources.
* Returns OPAL_SUCCESS or error.
*/
int (*start_preload_resource)(enum resource_id id,
uint32_t idx,
void *buf, size_t *len);
/*
* Returns true when resource is loaded.
* Only has to return true once, for the
* preivous start_preload_resource call for this resource.
* If not implemented, will return true and start_preload_resource
* *must* have synchronously done the load.
* Retruns OPAL_SUCCESS, OPAL_BUSY or an error code
*/
int (*resource_loaded)(enum resource_id id, uint32_t idx);
/*
* Executed just prior to handing control over to the payload.
*/
void (*exit)(void);
/*
* Read a sensor value
*/
int64_t (*sensor_read)(uint32_t sensor_hndl, int token,
uint32_t *sensor_data);
/*
* OPAL terminate
*/
void __attribute__((noreturn)) (*terminate)(const char *msg);
};
extern struct platform __platforms_start;
extern struct platform __platforms_end;
extern struct platform platform;
#define DECLARE_PLATFORM(name)\
static const struct platform __used __section(".platforms") name ##_platform
extern void probe_platform(void);
extern int start_preload_resource(enum resource_id id, uint32_t subid,
void *buf, size_t *len);
extern int resource_loaded(enum resource_id id, uint32_t idx);
extern int wait_for_resource_loaded(enum resource_id id, uint32_t idx);
extern void mambo_sim_exit(void);
#endif /* __PLATFORM_H */
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