From 9569c40668290408eac447f9be99dab603c8e34c Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 5 Mar 2015 12:25:26 -0700 Subject: dm: sandbox: pci: Add PCI support for sandbox 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 --- arch/sandbox/include/asm/u-boot-sandbox.h | 48 +++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'arch/sandbox/include/asm/u-boot-sandbox.h') diff --git a/arch/sandbox/include/asm/u-boot-sandbox.h b/arch/sandbox/include/asm/u-boot-sandbox.h index 770ab5c9cc..d5b9361683 100644 --- a/arch/sandbox/include/asm/u-boot-sandbox.h +++ b/arch/sandbox/include/asm/u-boot-sandbox.h @@ -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_ */ -- cgit v1.2.1