From b519c9c7e68d5e2e9d5aaff3843fda09342c79d7 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 18 Aug 2022 17:18:12 +0200 Subject: ARM: footbridge: remove addin mode This does not appear to have been used in many years, we can kill off some of the uglier code. Among other things, it avoids a randconfig issue when both modes are disabled: arch/arm/mach-footbridge/common.c:149:24: error: 'ebsa285_host_io_desc' defined but not used [-Werror=unused-variable] 149 | static struct map_desc ebsa285_host_io_desc[] __initdata = { | ^~~~~~~~~~~~~~~~~~~~ arch/arm/mach-footbridge/common.c:136:24: error: 'fb_common_io_desc' defined but not used [-Werror=unused-variable] 136 | static struct map_desc fb_common_io_desc[] __initdata = { | ^~~~~~~~~~~~~~~~~ The recently added phys_to_dma() functions are now trivial and could probably be removed again as a follow-up, if anyone knows how. Cc: Christoph Hellwig Tested-by: Marc Zyngier Signed-off-by: Arnd Bergmann --- arch/arm/mach-footbridge/common.c | 73 ++++----------------------------------- 1 file changed, 6 insertions(+), 67 deletions(-) (limited to 'arch/arm/mach-footbridge/common.c') diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c index 5020eb96b025..9483eccea5ae 100644 --- a/arch/arm/mach-footbridge/common.c +++ b/arch/arm/mach-footbridge/common.c @@ -198,9 +198,6 @@ void __init footbridge_init_irq(void) __fb_init_irq(); - if (!footbridge_cfn_mode()) - return; - if (machine_is_ebsa285()) /* The following is dependent on which slot * you plug the Southbridge card into. We @@ -221,21 +218,13 @@ void __init footbridge_init_irq(void) * commented out since there is a "No Fix" problem with it. Not mapping * it means that we have extra bullet protection on our feet. */ -static struct map_desc fb_common_io_desc[] __initdata = { +static struct map_desc ebsa285_host_io_desc[] __initdata = { { .virtual = ARMCSR_BASE, .pfn = __phys_to_pfn(DC21285_ARMCSR_BASE), .length = ARMCSR_SIZE, .type = MT_DEVICE, - } -}; - -/* - * The mapping when the footbridge is in host mode. We don't map any of - * this when we are in add-in mode. - */ -static struct map_desc ebsa285_host_io_desc[] __initdata = { -#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST) + }, { .virtual = PCIMEM_BASE, .pfn = __phys_to_pfn(DC21285_PCI_MEM), @@ -257,26 +246,12 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = { .length = PCIIACK_SIZE, .type = MT_DEVICE, }, -#endif }; void __init footbridge_map_io(void) { - /* - * Set up the common mapping first; we need this to - * determine whether we're in host mode or not. - */ - iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc)); - - /* - * Now, work out what we've got to map in addition on this - * platform. - */ - if (footbridge_cfn_mode()) { - iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc)); - pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO)); - } - + iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc)); + pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO)); vga_base = PCIMEM_BASE; } @@ -307,48 +282,12 @@ void footbridge_restart(enum reboot_mode mode, const char *cmd) } } -#ifdef CONFIG_FOOTBRIDGE_ADDIN - -static inline unsigned long fb_bus_sdram_offset(void) -{ - return *CSR_PCISDRAMBASE & 0xfffffff0; -} - -/* - * These two functions convert virtual addresses to PCI addresses and PCI - * addresses to virtual addresses. Note that it is only legal to use these - * on memory obtained via get_zeroed_page or kmalloc. - */ -unsigned long __virt_to_bus(unsigned long res) -{ - WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); - - return res + (fb_bus_sdram_offset() - PAGE_OFFSET); -} -EXPORT_SYMBOL(__virt_to_bus); - -unsigned long __bus_to_virt(unsigned long res) -{ - res = res - (fb_bus_sdram_offset() - PAGE_OFFSET); - - WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); - - return res; -} -EXPORT_SYMBOL(__bus_to_virt); -#else -static inline unsigned long fb_bus_sdram_offset(void) -{ - return BUS_OFFSET; -} -#endif /* CONFIG_FOOTBRIDGE_ADDIN */ - dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { - return paddr + (fb_bus_sdram_offset() - PHYS_OFFSET); + return paddr + (BUS_OFFSET - PHYS_OFFSET); } phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { - return dev_addr - (fb_bus_sdram_offset() - PHYS_OFFSET); + return dev_addr - (BUS_OFFSET - PHYS_OFFSET); } -- cgit