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-rw-r--r--target/linux/brcm47xx/patches-2.6.25/800-fix_cfe_detection.patch108
1 files changed, 108 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.25/800-fix_cfe_detection.patch b/target/linux/brcm47xx/patches-2.6.25/800-fix_cfe_detection.patch
new file mode 100644
index 000000000..e72f99e80
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.25/800-fix_cfe_detection.patch
@@ -0,0 +1,108 @@
+--- a/arch/mips/bcm47xx/prom.c
++++ b/arch/mips/bcm47xx/prom.c
+@@ -32,6 +32,7 @@
+ #include <asm/fw/cfe/cfe_error.h>
+
+ static int cfe_cons_handle;
++static void (* __prom_putchar)(char c);
+
+ const char *get_system_type(void)
+ {
+@@ -40,65 +41,40 @@
+
+ void prom_putchar(char c)
+ {
++ if (__prom_putchar)
++ __prom_putchar(c);
++}
++
++void prom_putchar_cfe(char c)
++{
+ while (cfe_write(cfe_cons_handle, &c, 1) == 0)
+ ;
+ }
+
+-static __init void prom_init_cfe(void)
++static __init int prom_init_cfe(void)
+ {
+ uint32_t cfe_ept;
+ uint32_t cfe_handle;
+ uint32_t cfe_eptseal;
+- int argc = fw_arg0;
+- char **envp = (char **) fw_arg2;
+- int *prom_vec = (int *) fw_arg3;
+-
+- /*
+- * Check if a loader was used; if NOT, the 4 arguments are
+- * what CFE gives us (handle, 0, EPT and EPTSEAL)
+- */
+- if (argc < 0) {
+- cfe_handle = (uint32_t)argc;
+- cfe_ept = (uint32_t)envp;
+- cfe_eptseal = (uint32_t)prom_vec;
+- } else {
+- if ((int)prom_vec < 0) {
+- /*
+- * Old loader; all it gives us is the handle,
+- * so use the "known" entrypoint and assume
+- * the seal.
+- */
+- cfe_handle = (uint32_t)prom_vec;
+- cfe_ept = 0xBFC00500;
+- cfe_eptseal = CFE_EPTSEAL;
+- } else {
+- /*
+- * Newer loaders bundle the handle/ept/eptseal
+- * Note: prom_vec is in the loader's useg
+- * which is still alive in the TLB.
+- */
+- cfe_handle = prom_vec[0];
+- cfe_ept = prom_vec[2];
+- cfe_eptseal = prom_vec[3];
+- }
+- }
+
+- if (cfe_eptseal != CFE_EPTSEAL) {
+- /* too early for panic to do any good */
+- printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
+- while (1) ;
+- }
++ cfe_eptseal = (uint32_t) fw_arg3;
++ cfe_handle = (uint32_t) fw_arg0;
++ cfe_ept = (uint32_t) fw_arg2;
++
++ if (cfe_eptseal != CFE_EPTSEAL)
++ return -1;
+
+ cfe_init(cfe_handle, cfe_ept);
++ return 0;
+ }
+
+-static __init void prom_init_console(void)
++static __init void prom_init_console_cfe(void)
+ {
+ /* Initialize CFE console */
+ cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
+ }
+
+-static __init void prom_init_cmdline(void)
++static __init void prom_init_cmdline_cfe(void)
+ {
+ char buf[CL_SIZE];
+
+@@ -146,9 +122,12 @@
+
+ void __init prom_init(void)
+ {
+- prom_init_cfe();
+- prom_init_console();
+- prom_init_cmdline();
++ if (prom_init_cfe() == 0) {
++ prom_init_console_cfe();
++ prom_init_cmdline_cfe();
++ __prom_putchar = prom_putchar_cfe;
++ }
++
+ prom_init_mem();
+ }
+