diff options
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/Kconfig.debug | 8 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/prom.h | 27 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/setup.h | 5 | ||||
| -rw-r--r-- | arch/microblaze/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/microblaze/kernel/early_printk.c | 184 | ||||
| -rw-r--r-- | arch/microblaze/kernel/misc.S | 35 | ||||
| -rw-r--r-- | arch/microblaze/kernel/prom.c | 82 | ||||
| -rw-r--r-- | arch/microblaze/kernel/setup.c | 17 |
8 files changed, 4 insertions, 355 deletions
diff --git a/arch/microblaze/Kconfig.debug b/arch/microblaze/Kconfig.debug index 012e377330cd..331a3bb66297 100644 --- a/arch/microblaze/Kconfig.debug +++ b/arch/microblaze/Kconfig.debug @@ -8,14 +8,6 @@ config TRACE_IRQFLAGS_SUPPORT source "lib/Kconfig.debug" -config EARLY_PRINTK - bool "Early printk function for kernel" - depends on SERIAL_UARTLITE_CONSOLE || SERIAL_8250_CONSOLE - default n - help - This option turns on/off early printk messages to console. - First Uartlite node is taken. - config HEART_BEAT bool "Heart beat function for kernel" default n diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h deleted file mode 100644 index 2f03ac815851..000000000000 --- a/arch/microblaze/include/asm/prom.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Definitions for talking to the Open Firmware PROM on - * Power Macintosh computers. - * - * Copyright (C) 1996-2005 Paul Mackerras. - * - * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ -#ifndef _ASM_MICROBLAZE_PROM_H -#define _ASM_MICROBLAZE_PROM_H - -#include <linux/of.h> - -/* Other Prototypes */ -enum early_consoles { - UARTLITE = 1, - UART16550 = 2, -}; - -extern int of_early_console(void *version); - -#endif /* _ASM_MICROBLAZE_PROM_H */ diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index 7c968c1d1729..d5384f6f36f7 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -19,16 +19,11 @@ extern char cmd_line[COMMAND_LINE_SIZE]; extern char *klimit; -int setup_early_printk(char *opt); -void remap_early_printk(void); -void disable_early_printk(void); - void microblaze_heartbeat(void); void microblaze_setup_heartbeat(void); # ifdef CONFIG_MMU extern void mmu_reset(void); -extern void early_console_reg_tlb_alloc(unsigned int addr); # endif /* CONFIG_MMU */ extern void of_platform_reset_gpio_probe(void); diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index 0da76fa1ab17..7e99cf6984a1 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -22,7 +22,6 @@ obj-y += dma.o exceptions.o \ obj-y += cpu/ -obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_HEART_BEAT) += heartbeat.o obj-$(CONFIG_MODULES) += microblaze_ksyms.o module.o obj-$(CONFIG_MMU) += misc.o diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c deleted file mode 100644 index 365f2d53f1b2..000000000000 --- a/arch/microblaze/kernel/early_printk.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * Early printk support for Microblaze. - * - * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2007-2009 PetaLogix - * Copyright (C) 2003-2006 Yasushi SHOJI <yashi@atmark-techno.com> - * - * 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. - */ - -#include <linux/console.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/tty.h> -#include <linux/io.h> -#include <asm/processor.h> -#include <linux/fcntl.h> -#include <asm/setup.h> -#include <asm/prom.h> - -static u32 base_addr; - -#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE -static void early_printk_uartlite_putc(char c) -{ - /* - * Limit how many times we'll spin waiting for TX FIFO status. - * This will prevent lockups if the base address is incorrectly - * set, or any other issue on the UARTLITE. - * This limit is pretty arbitrary, unless we are at about 10 baud - * we'll never timeout on a working UART. - */ - - unsigned retries = 1000000; - /* read status bit - 0x8 offset */ - while (--retries && (in_be32(base_addr + 8) & (1 << 3))) - ; - - /* Only attempt the iowrite if we didn't timeout */ - /* write to TX_FIFO - 0x4 offset */ - if (retries) - out_be32(base_addr + 4, c & 0xff); -} - -static void early_printk_uartlite_write(struct console *unused, - const char *s, unsigned n) -{ - while (*s && n-- > 0) { - if (*s == '\n') - early_printk_uartlite_putc('\r'); - early_printk_uartlite_putc(*s); - s++; - } -} - -static struct console early_serial_uartlite_console = { - .name = "earlyser", - .write = early_printk_uartlite_write, - .flags = CON_PRINTBUFFER | CON_BOOT, - .index = -1, -}; -#endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */ - -#ifdef CONFIG_SERIAL_8250_CONSOLE -static void early_printk_uart16550_putc(char c) -{ - /* - * Limit how many times we'll spin waiting for TX FIFO status. - * This will prevent lockups if the base address is incorrectly - * set, or any other issue on the UARTLITE. - * This limit is pretty arbitrary, unless we are at about 10 baud - * we'll never timeout on a working UART. - */ - - #define UART_LSR_TEMT 0x40 /* Transmitter empty */ - #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ - #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - - unsigned retries = 10000; - - while (--retries && - !((in_be32(base_addr + 0x14) & BOTH_EMPTY) == BOTH_EMPTY)) - ; - - if (retries) - out_be32(base_addr, c & 0xff); -} - -static void early_printk_uart16550_write(struct console *unused, - const char *s, unsigned n) -{ - while (*s && n-- > 0) { - if (*s == '\n') - early_printk_uart16550_putc('\r'); - early_printk_uart16550_putc(*s); - s++; - } -} - -static struct console early_serial_uart16550_console = { - .name = "earlyser", - .write = early_printk_uart16550_write, - .flags = CON_PRINTBUFFER | CON_BOOT, - .index = -1, -}; -#endif /* CONFIG_SERIAL_8250_CONSOLE */ - -int __init setup_early_printk(char *opt) -{ - int version = 0; - - if (early_console) - return 1; - - base_addr = of_early_console(&version); - if (base_addr) { -#ifdef CONFIG_MMU - early_console_reg_tlb_alloc(base_addr); -#endif - switch (version) { -#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE - case UARTLITE: - pr_info("Early console on uartlite at 0x%08x\n", - base_addr); - early_console = &early_serial_uartlite_console; - break; -#endif -#ifdef CONFIG_SERIAL_8250_CONSOLE - case UART16550: - pr_info("Early console on uart16650 at 0x%08x\n", - base_addr); - early_console = &early_serial_uart16550_console; - break; -#endif - default: - pr_info("Unsupported early console %d\n", - version); - return 1; - } - - register_console(early_console); - return 0; - } - return 1; -} - -/* Remap early console to virtual address and do not allocate one TLB - * only for early console because of performance degression */ -void __init remap_early_printk(void) -{ - if (!early_console) - return; - pr_info("early_printk_console remapping from 0x%x to ", base_addr); - base_addr = (u32) ioremap(base_addr, PAGE_SIZE); - pr_cont("0x%x\n", base_addr); - -#ifdef CONFIG_MMU - /* - * Early console is on the top of skipped TLB entries - * decrease tlb_skip size ensure that hardcoded TLB entry will be - * used by generic algorithm - * FIXME check if early console mapping is on the top by rereading - * TLB entry and compare baseaddr - * mts rtlbx, (tlb_skip - 1) - * nop - * mfs rX, rtlblo - * nop - * cmp rX, orig_base_addr - */ - tlb_skip -= 1; -#endif -} - -void __init disable_early_printk(void) -{ - if (!early_console) - return; - pr_warn("disabling early console\n"); - unregister_console(early_console); - early_console = NULL; -} diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S index 1dafddeb8a0b..6759af688451 100644 --- a/arch/microblaze/kernel/misc.S +++ b/arch/microblaze/kernel/misc.S @@ -63,38 +63,3 @@ _tlbie_1: nop .size _tlbie, . - _tlbie - -/* - * Allocate TLB entry for early console - */ -.globl early_console_reg_tlb_alloc; -.type early_console_reg_tlb_alloc, @function -.align 4; -early_console_reg_tlb_alloc: - /* - * Load a TLB entry for the UART, so that microblaze_progress() can use - * the UARTs nice and early. We use a 4k real==virtual mapping. - */ - lwi r4, r0, tlb_skip - mts rtlbx, r4 /* TLB slot 63 */ - - or r4,r5,r0 - andi r4,r4,0xfffff000 - ori r4,r4,(TLB_WR|TLB_I|TLB_M|TLB_G) - - andi r5,r5,0xfffff000 - ori r5,r5,(TLB_VALID | TLB_PAGESZ(PAGESZ_4K)) - - mts rtlblo,r4 /* Load the data portion of the entry */ - nop - mts rtlbhi,r5 /* Load the tag portion of the entry */ - nop - - lwi r5, r0, tlb_skip - addik r5, r5, 1 - swi r5, r0, tlb_skip - - rtsd r15, 8 - nop - - .size early_console_reg_tlb_alloc, . - early_console_reg_tlb_alloc diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 68f099960ebc..c76c93b90b79 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -13,91 +13,11 @@ * 2 of the License, or (at your option) any later version. */ -#include <stdarg.h> -#include <linux/export.h> #include <linux/kernel.h> #include <linux/string.h> -#include <linux/init.h> -#include <linux/threads.h> -#include <linux/spinlock.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/stringify.h> -#include <linux/delay.h> -#include <linux/initrd.h> -#include <linux/bitops.h> -#include <linux/kexec.h> -#include <linux/debugfs.h> -#include <linux/irq.h> #include <linux/memblock.h> #include <linux/of_fdt.h> -#include <asm/prom.h> -#include <asm/page.h> -#include <asm/processor.h> -#include <asm/irq.h> -#include <linux/io.h> -#include <asm/mmu.h> -#include <asm/pgtable.h> -#include <asm/sections.h> -#include <asm/pci-bridge.h> - -#ifdef CONFIG_EARLY_PRINTK -static const char *stdout; - -static int __init early_init_dt_scan_chosen_serial(unsigned long node, - const char *uname, int depth, void *data) -{ - int l; - const char *p; - - pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname); - - if (depth == 1 && (strcmp(uname, "chosen") == 0 || - strcmp(uname, "chosen@0") == 0)) { - p = of_get_flat_dt_prop(node, "linux,stdout-path", &l); - if (p != NULL && l > 0) - stdout = p; /* store pointer to stdout-path */ - } - - if (stdout && strstr(stdout, uname)) { - p = of_get_flat_dt_prop(node, "compatible", &l); - pr_debug("Compatible string: %s\n", p); - - if ((strncmp(p, "xlnx,xps-uart16550", 18) == 0) || - (strncmp(p, "xlnx,axi-uart16550", 18) == 0)) { - unsigned int addr; - - *(u32 *)data = UART16550; - - addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l); - addr += *(u32 *)of_get_flat_dt_prop(node, - "reg-offset", &l); - /* clear register offset */ - return be32_to_cpu(addr) & ~3; - } - if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) || - (strncmp(p, "xlnx,opb-uartlite", 17) == 0) || - (strncmp(p, "xlnx,axi-uartlite", 17) == 0) || - (strncmp(p, "xlnx,mdm", 8) == 0)) { - const unsigned int *addrp; - - *(u32 *)data = UARTLITE; - - addrp = of_get_flat_dt_prop(node, "reg", &l); - return be32_to_cpup(addrp); /* return address */ - } - } - return 0; -} - -/* this function is looking for early console - Microblaze specific */ -int __init of_early_console(void *version) -{ - return of_scan_flat_dt(early_init_dt_scan_chosen_serial, version); -} -#endif - void __init early_init_devtree(void *params) { pr_debug(" -> early_init_devtree(%p)\n", params); @@ -106,8 +26,6 @@ void __init early_init_devtree(void *params) if (!strlen(boot_command_line)) strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); - parse_early_param(); - memblock_allow_resize(); pr_debug("Phys. mem: %lx\n", (unsigned long) memblock_phys_mem_size()); diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index be98ffe28ca8..bbd6968ce55b 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -27,13 +27,12 @@ #include <linux/param.h> #include <linux/pci.h> #include <linux/cache.h> -#include <linux/of_platform.h> +#include <linux/of.h> #include <linux/dma-mapping.h> #include <asm/cacheflush.h> #include <asm/entry.h> #include <asm/cpuinfo.h> -#include <asm/prom.h> #include <asm/pgtable.h> DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ @@ -54,6 +53,9 @@ void __init setup_arch(char **cmdline_p) { *cmdline_p = boot_command_line; + setup_memory(); + parse_early_param(); + console_verbose(); unflatten_device_tree(); @@ -62,13 +64,6 @@ void __init setup_arch(char **cmdline_p) microblaze_cache_init(); - setup_memory(); - -#ifdef CONFIG_EARLY_PRINTK - /* remap early console to virtual address */ - remap_early_printk(); -#endif - xilinx_pci_init(); #if defined(CONFIG_DUMMY_CONSOLE) @@ -133,10 +128,6 @@ void __init machine_early_init(const char *cmdline, unsigned int ram, /* initialize device tree for usage in early_printk */ early_init_devtree(_fdt_start); -#ifdef CONFIG_EARLY_PRINTK - setup_early_printk(NULL); -#endif - /* setup kernel_tlb after BSS cleaning * Maybe worth to move to asm code */ kernel_tlb = tlb0 + tlb1; |
