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dm: sandbox: pci: Add PCI support for sandbox

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Add the required header information, device tree nodes and I/O accessor
functions to support PCI on sandbox. All devices are emulated by drivers
which can be added as required for testing or development.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-03-05 12:25:26 -07:00
parent ff3e077bd2
commit 9569c40668
9 changed files with 284 additions and 7 deletions
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48
arch/sandbox/include/asm/u-boot-sandbox.h
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@ -27,4 +27,52 @@ int cleanup_before_linux(void);
/* drivers/video/sandbox_sdl.c */
int sandbox_lcd_sdl_early_init(void);
/**
* pci_map_physmem() - map a PCI device into memory
*
* This is used on sandbox to map a device into memory so that it can be
* used with normal memory access. After this call, some part of the device's
* internal structure becomes visible.
*
* This function is normally called from sandbox's map_sysmem() automatically.
*
* @paddr: Physical memory address, normally corresponding to a PCI BAR
* @lenp: On entry, the size of the area to map, On exit it is updated
* to the size actually mapped, which may be less if the device
* has less space
* @devp: Returns the device which mapped into this space
* @ptrp: Returns a pointer to the mapped address. The device's space
* can be accessed as @lenp bytes starting here
* @return 0 if OK, -ve on error
*/
int pci_map_physmem(phys_addr_t paddr, unsigned long *lenp,
struct udevice **devp, void **ptrp);
/**
* pci_unmap_physmem() - undo a memory mapping
*
* This must be called after pci_map_physmem() to undo the mapping.
*
* @paddr: Physical memory address, as passed to pci_map_physmem()
* @len: Size of area mapped, as returned by pci_map_physmem()
* @dev: Device to unmap, as returned by pci_map_physmem()
* @return 0 if OK, -ve on error
*/
int pci_unmap_physmem(const void *addr, unsigned long len,
struct udevice *dev);
/**
* sandbox_set_enable_pci_map() - Enable / disable PCI address mapping
*
* Since address mapping involves calling every driver, provide a way to
* enable and disable this. It can be handled automatically by the emulator
* uclass, which knows if any emulators are currently active.
*
* If this is disabled, pci_map_physmem() will not be called from
* map_sysmem().
*
* @enable: 0 to disable, 1 to enable
*/
void sandbox_set_enable_pci_map(int enable);
#endif /* _U_BOOT_SANDBOX_H_ */