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changeset 226:f69b3aa3c06d

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Add Linux boot command.
author gthomas
date Tue, 25 Jun 2002 23:20:45 +0000
parents 278800005641
children bded64db11ce
files packages/hal/powerpc/viper/current/ChangeLog packages/hal/powerpc/viper/current/cdl/hal_powerpc_viper.cdl packages/hal/powerpc/viper/current/src/redboot_linux_exec.c
diffstat 3 files changed, 289 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/packages/hal/powerpc/viper/current/ChangeLog
+++ b/packages/hal/powerpc/viper/current/ChangeLog
@@ -1,3 +1,8 @@
+2002-06-25  Gary Thomas  <gary@chez-thomas.org>
+
+	* src/redboot_linux_exec.c:
+	* cdl/hal_powerpc_viper.cdl: Add Linux boot (exec) command.
+
 2002-06-24  Gary Thomas  <gary@chez-thomas.org>
 
 	* misc/redboot_ROMRAM.ecm: Update for new FLASH chips.
--- a/packages/hal/powerpc/viper/current/cdl/hal_powerpc_viper.cdl
+++ b/packages/hal/powerpc/viper/current/cdl/hal_powerpc_viper.cdl
@@ -42,7 +42,7 @@
 #
 # Author(s):      jskov
 # Original data:  hmt
-# Contributors:
+# Contributors:   gthomas
 # Date:           1999-11-02
 #
 #####DESCRIPTIONEND####
@@ -332,6 +332,16 @@ cdl_package CYGPKG_HAL_POWERPC_VIPER {
             This option lists the target's requirements for a valid Redboot
             configuration."
 
+        cdl_option CYGSEM_REDBOOT_HAL_LINUX_BOOT {
+            display        "Support booting Linux via RedBoot"
+            flavor         bool
+            default_value  1
+            description    "
+               This option enables RedBoot to support booting of a Linux kernel."
+
+            compile -library=libextras.a redboot_linux_exec.c
+        }
+
         cdl_option CYGBLD_BUILD_REDBOOT_BIN {
             display       "Build Redboot ROM binary image"
             active_if     CYGBLD_BUILD_REDBOOT
@@ -341,7 +351,7 @@ cdl_package CYGPKG_HAL_POWERPC_VIPER {
                          image to a binary image suitable for ROM programming."
 
 #            compile -library=libextras.a redboot_cmds.c
-    
+ 
             make -priority 325 {
                 <PREFIX>/bin/redboot.bin : <PREFIX>/bin/redboot.elf
                 $(OBJCOPY) --strip-debug $< $(@:.bin=.img) 
new file mode 100644
--- /dev/null
+++ b/packages/hal/powerpc/viper/current/src/redboot_linux_exec.c
@@ -0,0 +1,272 @@
+//==========================================================================
+//
+//      redboot_linux_boot.c
+//
+//      RedBoot command to boot Linux
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+//
+// eCos 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 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//####OTHERCOPYRIGHTBEGIN####
+//
+//  The structure definitions below are taken from include/ppc/platforms/am860.h in
+//  the Linux kernel, Copyright (c) 2002 Gary Thomas, Copyright (c) 1997 Dan Malek. 
+//  Their presence here is for the express purpose of communication with the Linux 
+//  kernel being booted and is considered 'fair use' by the original author and
+//  are included with their permission.
+//
+//####OTHERCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    msalter
+// Contributors: gthomas,msalter
+// Date:         2002-01-14
+// Purpose:      
+// Description:  
+//              
+// This code is part of RedBoot (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <redboot.h>
+#include <pkgconf/hal_powerpc_quicc.h>
+
+#include <cyg/hal/hal_arch.h>
+#include <cyg/hal/hal_if.h>
+#include <cyg/hal/hal_intr.h>
+#include <cyg/hal/hal_cache.h>
+
+#ifdef CYGPKG_REDBOOT_NETWORKING
+#include <net/net.h>
+#endif
+
+#ifdef CYGSEM_REDBOOT_HAL_LINUX_BOOT
+
+#include CYGHWR_MEMORY_LAYOUT_H
+
+//=========================================================================
+
+// Exported CLI function(s)
+static void do_exec(int argc, char *argv[]);
+RedBoot_cmd("exec", 
+            "Execute a Linux image - with MMU off", 
+            "[-w timeout]\n"
+            "        [-c \"kernel command line\"] [<entry_point>]",
+            do_exec
+    );
+
+//=========================================================================
+// Imported from Linux kernel include/asm-ppc/am860.h
+//   Copyright (c) 2002 Gary Thomas (gary@chez-thomas.org)
+//   Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
+//   Used with permission of author(s).
+
+
+/* A Board Information structure that is given to a program when
+ * RedBoot starts it up.
+ */
+typedef struct bd_info {
+	unsigned int	bi_tag;		/* Should be 0x42444944 "BDID" */
+	unsigned int	bi_size;	/* Size of this structure */
+	unsigned int	bi_revision;	/* revision of this structure */
+	unsigned int	bi_bdate;	/* EPPCbug date, i.e. 0x11061997 */
+	unsigned int	bi_memstart;	/* Memory start address */
+	unsigned int	bi_memsize;	/* Memory (end) size in bytes */
+	unsigned int	bi_intfreq;	/* Internal Freq, in Hz */
+	unsigned int	bi_busfreq;	/* Bus Freq, in Hz */
+	unsigned int	bi_clun;	/* Boot device controller */
+	unsigned int	bi_dlun;	/* Boot device logical dev */
+	unsigned char	bi_enetaddr[6];
+	unsigned int	bi_baudrate;
+        unsigned char   *bi_cmdline;
+} bd_t;
+
+//
+// Execute a Linux kernel - this is a RedBoot CLI command
+//
+static void 
+do_exec(int argc, char *argv[])
+{
+    unsigned long entry;
+    bool wait_time_set, cmd_line_set;
+    int  wait_time;
+    char *cmd_line;
+    char *cline;
+    struct option_info opts[2];
+    hal_virtual_comm_table_t *__chan;
+    int baud_rate;
+
+    bd_t *board_info;
+    CYG_INTERRUPT_STATE oldints;
+    unsigned long sp = CYGMEM_REGION_ram+CYGMEM_REGION_ram_SIZE;
+    
+    init_opts(&opts[0], 'w', true, OPTION_ARG_TYPE_NUM, 
+              (void **)&wait_time, (bool *)&wait_time_set, "wait timeout");
+    init_opts(&opts[1], 'c', true, OPTION_ARG_TYPE_STR, 
+              (void **)&cmd_line, (bool *)&cmd_line_set, "kernel command line");
+    entry = entry_address;  // Default from last 'load' operation
+    if (!scan_opts(argc, argv, 1, opts, 2, (void *)&entry, OPTION_ARG_TYPE_NUM, 
+                   "[physical] starting address")) {
+        return;
+    }
+
+    // Determine baud rate on current console
+    __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
+    baud_rate = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_GETBAUD);
+    if (baud_rate <= 0) {
+        baud_rate = CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD;
+    }
+
+    // Make a little space at the top of the stack, and align to
+    // 64-bit boundary.
+    sp = (sp-128) & ~7;  // The Linux boot code uses this space for FIFOs
+    
+    // Copy the commandline onto the stack, and set the SP to just below it.
+    if (cmd_line_set) {
+	int len,i;
+
+	// get length of string
+	for( len = 0; cmd_line[len] != '\0'; len++ );
+
+	// decrement sp by length of string and align to
+	// word boundary.
+	sp = (sp-(len+1)) & ~3;
+
+	// assign this SP value to command line start
+	cline = (char *)sp;
+
+	// copy command line over.
+	for( i = 0; i < len; i++ )
+	    cline[i] = cmd_line[i];
+	cline[len] = '\0';
+
+    } else {
+        cline = (char *)NULL;
+    }
+    
+    // Set up parameter struct at top of stack
+    sp = sp-sizeof(bd_t);
+    board_info = (bd_t *)sp;
+    memset(board_info, sizeof(*board_info), 0);
+    
+    board_info->bi_tag		= 0x42444944;
+    board_info->bi_size		= sizeof(board_info);
+    board_info->bi_revision	= 1;
+    board_info->bi_bdate	= 0x06012002;
+    board_info->bi_memstart	= CYGMEM_REGION_ram;
+    board_info->bi_memsize	= CYGMEM_REGION_ram_SIZE;
+    board_info->bi_intfreq	= CYGHWR_HAL_POWERPC_BOARD_SPEED*1000000;
+    board_info->bi_busfreq	= 66*1000000;
+    board_info->bi_clun		= 0;  // ????
+    board_info->bi_dlun		= 0;  // ????
+    board_info->bi_baudrate     = baud_rate;
+    board_info->bi_cmdline      = cline;
+#ifdef CYGPKG_REDBOOT_NETWORKING
+    memcpy(board_info->bi_enetaddr, __local_enet_addr, sizeof(enet_addr_t));
+#endif
+
+    // adjust SP to 64 bit boundary, and leave a little space
+    // between it and the commandline for PowerPC calling
+    // conventions.
+	
+    sp = (sp-32)&~7;
+
+    if (wait_time_set) {
+        int script_timeout_ms = wait_time * 1000;
+#ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
+        unsigned char *hold_script = script;
+        script = (unsigned char *)0;
+#endif
+        diag_printf("About to start execution at %p - abort with ^C within %d seconds\n",
+                    (void *)entry, wait_time);
+        while (script_timeout_ms >= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT) {
+            int res;
+            char line[80];
+            res = _rb_gets(line, sizeof(line), CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT);
+            if (res == _GETS_CTRLC) {
+#ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
+                script = hold_script;  // Re-enable script
+#endif
+                return;
+            }
+            script_timeout_ms -= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT;
+        }
+    }
+
+    // Disable interrupts
+    HAL_DISABLE_INTERRUPTS(oldints);
+
+    // Put the caches to sleep.
+    HAL_DCACHE_SYNC();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_DISABLE();
+    HAL_DCACHE_SYNC();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+
+//    diag_printf("entry %08x, sp %08x, info %08x, cmd line %08x, baud %d\n",
+//		entry, sp, board_info, cline, baud_rate);
+//    breakpoint();
+    
+    // Call into Linux
+    __asm__ volatile (        
+	               // Start by disabling MMU - the mappings are
+	               // 1-1 so this should not cause any problems
+	               "mfmsr	3\n"
+		       "li      4,0xFFFFFFCF\n"
+		       "and	3,3,4\n"
+		       "sync\n"
+		       "mtmsr	3\n"
+		       "sync\n"
+
+		       // Now set up parameters to jump into linux
+
+		       "mtlr	%0\n"		// set entry address in LR
+		       "mr	1,%1\n"		// set stack pointer
+		       "mr	3,%2\n"		// set board info in R3
+		       "mr	4,%3\n"		// set command line in R4
+		       "blr          \n"	// jump into linux
+		       :
+		       : "r"(entry),"r"(sp),"r"(board_info),"r"(cline)
+		       : "r3", "r4"
+	             
+	             );
+}
+
+#endif // CYGSEM_REDBOOT_HAL_LINUX_BOOT
+
+//=========================================================================
+// EOF redboot_linux_exec.c