diff options
Diffstat (limited to 'arch/mips/bmips')
| -rw-r--r-- | arch/mips/bmips/Platform | 1 | ||||
| -rw-r--r-- | arch/mips/bmips/dma.c | 110 | ||||
| -rw-r--r-- | arch/mips/bmips/setup.c | 43 |
3 files changed, 37 insertions, 117 deletions
diff --git a/arch/mips/bmips/Platform b/arch/mips/bmips/Platform index 5f127fd7f4b5..1434ea31ce85 100644 --- a/arch/mips/bmips/Platform +++ b/arch/mips/bmips/Platform @@ -1,7 +1,6 @@ # # Broadcom Generic BMIPS kernel # -platform-$(CONFIG_BMIPS_GENERIC) += bmips/ cflags-$(CONFIG_BMIPS_GENERIC) += \ -I$(srctree)/arch/mips/include/asm/mach-bmips/ load-$(CONFIG_BMIPS_GENERIC) := 0xffffffff80010000 diff --git a/arch/mips/bmips/dma.c b/arch/mips/bmips/dma.c index df56bf4179e3..3779e7855bd7 100644 --- a/arch/mips/bmips/dma.c +++ b/arch/mips/bmips/dma.c @@ -1,68 +1,11 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2014 Kevin Cernekee <cernekee@gmail.com> - */ +// SPDX-License-Identifier: GPL-2.0+ -#define pr_fmt(fmt) "bmips-dma: " fmt - -#include <linux/device.h> -#include <linux/dma-direction.h> -#include <linux/dma-mapping.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/printk.h> -#include <linux/slab.h> #include <linux/types.h> +#include <linux/dma-map-ops.h> #include <asm/bmips.h> +#include <asm/io.h> -/* - * BCM338x has configurable address translation windows which allow the - * peripherals' DMA addresses to be different from the Zephyr-visible - * physical addresses. e.g. usb_dma_addr = zephyr_pa ^ 0x08000000 - * - * If the "brcm,ubus" node has a "dma-ranges" property we will enable this - * translation globally using the provided information. This implements a - * very limited subset of "dma-ranges" support and it will probably be - * replaced by a more generic version later. - */ - -struct bmips_dma_range { - u32 child_addr; - u32 parent_addr; - u32 size; -}; - -static struct bmips_dma_range *bmips_dma_ranges; - -#define FLUSH_RAC 0x100 - -dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t pa) -{ - struct bmips_dma_range *r; - - for (r = bmips_dma_ranges; r && r->size; r++) { - if (pa >= r->child_addr && - pa < (r->child_addr + r->size)) - return pa - r->child_addr + r->parent_addr; - } - return pa; -} - -phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr) -{ - struct bmips_dma_range *r; - - for (r = bmips_dma_ranges; r && r->size; r++) { - if (dma_addr >= r->parent_addr && - dma_addr < (r->parent_addr + r->size)) - return dma_addr - r->parent_addr + r->child_addr; - } - return dma_addr; -} +bool bmips_rac_flush_disable; void arch_sync_dma_for_cpu_all(void) { @@ -74,50 +17,11 @@ void arch_sync_dma_for_cpu_all(void) boot_cpu_type() != CPU_BMIPS4380) return; + if (unlikely(bmips_rac_flush_disable)) + return; + /* Flush stale data out of the readahead cache */ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); __raw_readl(cbr + BMIPS_RAC_CONFIG); } - -static int __init bmips_init_dma_ranges(void) -{ - struct device_node *np = - of_find_compatible_node(NULL, NULL, "brcm,ubus"); - const __be32 *data; - struct bmips_dma_range *r; - int len; - - if (!np) - return 0; - - data = of_get_property(np, "dma-ranges", &len); - if (!data) - goto out_good; - - len /= sizeof(*data) * 3; - if (!len) - goto out_bad; - - /* add a dummy (zero) entry at the end as a sentinel */ - bmips_dma_ranges = kcalloc(len + 1, sizeof(struct bmips_dma_range), - GFP_KERNEL); - if (!bmips_dma_ranges) - goto out_bad; - - for (r = bmips_dma_ranges; len; len--, r++) { - r->child_addr = be32_to_cpup(data++); - r->parent_addr = be32_to_cpup(data++); - r->size = be32_to_cpup(data++); - } - -out_good: - of_node_put(np); - return 0; - -out_bad: - pr_err("error parsing dma-ranges property\n"); - of_node_put(np); - return -EINVAL; -} -arch_initcall(bmips_init_dma_ranges); diff --git a/arch/mips/bmips/setup.c b/arch/mips/bmips/setup.c index 2f81a94c71a6..ec180ab92eaa 100644 --- a/arch/mips/bmips/setup.c +++ b/arch/mips/bmips/setup.c @@ -10,13 +10,12 @@ #include <linux/init.h> #include <linux/bitops.h> #include <linux/memblock.h> -#include <linux/clk-provider.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/of_clk.h> #include <linux/of_fdt.h> -#include <linux/of_platform.h> #include <linux/libfdt.h> #include <linux/smp.h> #include <asm/addrspace.h> @@ -28,12 +27,15 @@ #include <asm/smp-ops.h> #include <asm/time.h> #include <asm/traps.h> +#include <asm/fw/cfe/cfe_api.h> #define RELO_NORMAL_VEC BIT(18) #define REG_BCM6328_OTP ((void __iomem *)CKSEG1ADDR(0x1000062c)) #define BCM6328_TP1_DISABLED BIT(9) +extern bool bmips_rac_flush_disable; + static const unsigned long kbase = VMLINUX_LOAD_ADDRESS & 0xfff00000; struct bmips_quirk { @@ -103,6 +105,12 @@ static void bcm6358_quirks(void) * disable SMP for now */ bmips_smp_enabled = 0; + + /* + * RAC flush causes kernel panics on BCM6358 when booting from TP1 + * because the bootloader is not initializing it properly. + */ + bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)); } static void bcm6368_quirks(void) @@ -123,14 +131,21 @@ static const struct bmips_quirk bmips_quirk_list[] = { { }, }; -void __init prom_init(void) +static void __init bmips_init_cfe(void) { - bmips_cpu_setup(); - register_bmips_smp_ops(); + cfe_seal = fw_arg3; + + if (cfe_seal != CFE_EPTSEAL) + return; + + cfe_init(fw_arg0, fw_arg2); } -void __init prom_free_prom_memory(void) +void __init prom_init(void) { + bmips_init_cfe(); + bmips_cpu_setup(); + register_bmips_smp_ops(); } const char *get_system_type(void) @@ -162,15 +177,17 @@ void __init plat_mem_setup(void) ioport_resource.start = 0; ioport_resource.end = ~0; - /* intended to somewhat resemble ARM; see Documentation/arm/booting.rst */ + /* + * intended to somewhat resemble ARM; see + * Documentation/arch/arm/booting.rst + */ if (fw_arg0 == 0 && fw_arg1 == 0xffffffff) dtb = phys_to_virt(fw_arg2); - else if (fw_passed_dtb) /* UHI interface or appended dtb */ - dtb = (void *)fw_passed_dtb; - else if (__dtb_start != __dtb_end) - dtb = (void *)__dtb_start; else - panic("no dtb found"); + dtb = get_fdt(); + + if (!dtb) + cfe_die("no dtb found"); __dt_setup_arch(dtb); @@ -201,4 +218,4 @@ static int __init plat_dev_init(void) return 0; } -device_initcall(plat_dev_init); +arch_initcall(plat_dev_init); |