b201818044
Early printk was disabled because it caused hangs on some devices, the old patches were using the CFE console now we use the normal serial console, it is at a constant address. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> SVN-Revision: 38309
151 lines
3.9 KiB
Diff
151 lines
3.9 KiB
Diff
commit 808fe9c2fa81a6b3e20fe813d5410e7fd6606efa
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Author: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun Jul 18 15:11:26 2010 +0200
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MIPS: BCM47XX: Remove CFE support
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bcm47xx only uses the CFE code for early print to a console, but that
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is also possible with a early print serial 8250 driver.
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The CFE api init causes hangs somewhere in prom_init_cfe() on some
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devices like the Buffalo WHR-HP-G54 and the Asus WL-520GU.
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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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This will remove all the CFE handling code from bcm47xx.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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--- a/arch/mips/Kconfig
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+++ b/arch/mips/Kconfig
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@@ -112,13 +112,11 @@ config BCM47XX
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select CEVT_R4K
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select CSRC_R4K
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select DMA_NONCOHERENT
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- select FW_CFE
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select HW_HAS_PCI
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select IRQ_CPU
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select NO_EXCEPT_FILL
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_LITTLE_ENDIAN
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- select SYS_HAS_EARLY_PRINTK
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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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@@ -30,12 +30,9 @@
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#include <linux/spinlock.h>
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#include <linux/smp.h>
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#include <asm/bootinfo.h>
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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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#include <bcm47xx.h>
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#include <bcm47xx_board.h>
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-static int cfe_cons_handle;
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static char bcm47xx_system_type[20] = "Broadcom BCM47XX";
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@@ -52,91 +49,6 @@ __init void bcm47xx_set_system_type(u16
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chip_id);
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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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-{
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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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- 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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- }
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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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-}
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-
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static __init void prom_init_mem(void)
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{
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unsigned long mem;
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@@ -184,9 +96,6 @@ 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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