microblaze: remove redundant early_printk support
With earlycon support now enabled, the arch specific early_printk support can be removed. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Michal Simek <michal.simek@xilinx.com>hifive-unleashed-5.1
Rob Herring
Michal Simek
parent
f71044c999
commit
96f0e6fcc9
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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 */
|
||||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
}
|
||||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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());
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
|
|
|
|||
Loading…
Reference in New Issue