142 lines
3.7 KiB
Diff
142 lines
3.7 KiB
Diff
From 5219981646071abb6731634bf47781a53e248764 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 18 Jul 2010 15:11:26 +0200
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Subject: [PATCH 6/6] MIPS: BCM47xx: Remove CFE console
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Do not use the CFE console. It causes hangs on some devices like the
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Buffalo WHR-HP-G54.
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This was reported in https://dev.openwrt.org/ticket/4061 and
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https://forum.openwrt.org/viewtopic.php?id=17063
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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arch/mips/Kconfig | 1 -
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arch/mips/bcm47xx/prom.c | 82 +++------------------------------------------
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2 files changed, 6 insertions(+), 77 deletions(-)
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--- a/arch/mips/Kconfig
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+++ b/arch/mips/Kconfig
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@@ -100,7 +100,6 @@ config BCM47XX
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_LITTLE_ENDIAN
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select GENERIC_GPIO
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- select SYS_HAS_EARLY_PRINTK
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select CFE
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help
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Support for BCM47XX based boards
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--- a/arch/mips/bcm47xx/prom.c
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+++ b/arch/mips/bcm47xx/prom.c
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@@ -31,96 +31,28 @@
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#include <asm/fw/cfe/cfe_api.h>
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#include <asm/fw/cfe/cfe_error.h>
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-static int cfe_cons_handle;
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-
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const char *get_system_type(void)
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{
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return "Broadcom BCM47XX";
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}
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-void prom_putchar(char c)
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-{
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- while (cfe_write(cfe_cons_handle, &c, 1) == 0)
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- ;
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-}
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-
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-static __init void prom_init_cfe(void)
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+static __init int prom_init_cfe(void)
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{
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uint32_t cfe_ept;
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uint32_t cfe_handle;
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uint32_t cfe_eptseal;
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- int argc = fw_arg0;
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- char **envp = (char **) fw_arg2;
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- int *prom_vec = (int *) fw_arg3;
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-
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- /*
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- * Check if a loader was used; if NOT, the 4 arguments are
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- * what CFE gives us (handle, 0, EPT and EPTSEAL)
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- */
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- if (argc < 0) {
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- cfe_handle = (uint32_t)argc;
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- cfe_ept = (uint32_t)envp;
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- cfe_eptseal = (uint32_t)prom_vec;
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- } else {
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- if ((int)prom_vec < 0) {
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- /*
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- * Old loader; all it gives us is the handle,
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- * so use the "known" entrypoint and assume
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- * the seal.
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- */
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- cfe_handle = (uint32_t)prom_vec;
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- cfe_ept = 0xBFC00500;
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- cfe_eptseal = CFE_EPTSEAL;
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- } else {
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- /*
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- * Newer loaders bundle the handle/ept/eptseal
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- * Note: prom_vec is in the loader's useg
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- * which is still alive in the TLB.
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- */
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- cfe_handle = prom_vec[0];
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- cfe_ept = prom_vec[2];
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- cfe_eptseal = prom_vec[3];
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- }
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- }
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+
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+ cfe_eptseal = (uint32_t) fw_arg3;
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+ cfe_handle = (uint32_t) fw_arg0;
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+ cfe_ept = (uint32_t) fw_arg2;
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if (cfe_eptseal != CFE_EPTSEAL) {
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- /* too early for panic to do any good */
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printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
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- while (1) ;
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+ return -1;
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}
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cfe_init(cfe_handle, cfe_ept);
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-}
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-
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-static __init void prom_init_console(void)
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-{
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- /* Initialize CFE console */
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- cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
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-}
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-
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-static __init void prom_init_cmdline(void)
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-{
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- static char buf[COMMAND_LINE_SIZE] __initdata;
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-
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- /* Get the kernel command line from CFE */
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- if (cfe_getenv("LINUX_CMDLINE", buf, COMMAND_LINE_SIZE) >= 0) {
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- buf[COMMAND_LINE_SIZE - 1] = 0;
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- strcpy(arcs_cmdline, buf);
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- }
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-
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- /* Force a console handover by adding a console= argument if needed,
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- * as CFE is not available anymore later in the boot process. */
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- if ((strstr(arcs_cmdline, "console=")) == NULL) {
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- /* Try to read the default serial port used by CFE */
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- if ((cfe_getenv("BOOT_CONSOLE", buf, COMMAND_LINE_SIZE) < 0)
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- || (strncmp("uart", buf, 4)))
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- /* Default to uart0 */
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- strcpy(buf, "uart0");
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-
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- /* Compute the new command line */
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- snprintf(arcs_cmdline, COMMAND_LINE_SIZE, "%s console=ttyS%c,115200",
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- arcs_cmdline, buf[4]);
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- }
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+ return 0;
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}
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static __init void prom_init_mem(void)
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@@ -161,8 +93,6 @@ static __init void prom_init_mem(void)
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void __init prom_init(void)
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{
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prom_init_cfe();
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- prom_init_console();
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- prom_init_cmdline();
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prom_init_mem();
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}
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