brcm47xx: fix commit r18413 "128MB ram problem"

The patch commited in r18413 was wrong.
This patch prevents prom_init_mem from scanning over 128MB ram.
This is from #6765 and #3177

Refresh all patches


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20072 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 34 insertions, 19 deletions

diff --git a/target/linux/brcm47xx/patches-2.6.31/170-128MB_ram_bugfix.patch b/target/linux/brcm47xx/patches-2.6.31/170-128MB_ram_bugfix.patch
index e54e3de409..93f4b1f101 100644
--- a/target/linux/brcm47xx/patches-2.6.31/170-128MB_ram_bugfix.patch
+++ b/target/linux/brcm47xx/patches-2.6.31/170-128MB_ram_bugfix.patch
@@ -1,17 +1,32 @@
 --- a/arch/mips/bcm47xx/prom.c
 +++ b/arch/mips/bcm47xx/prom.c
-@@ -141,6 +141,14 @@ static __init void prom_init_mem(void)
- 			break;
- 	}
- 
-+	/* Ignoring the last page when ddr size is 128M. Cached
-+	 * accesses to last page is causing the processor to prefetch
-+	 * using address above 128M stepping out of the ddr address
-+	 * space.
-+	 */
-+	if (mem == 0x8000000)
-+		mem -= 0x1000;
-+
- 	add_memory_region(0, mem, BOOT_MEM_RAM);
- }
+@@ -126,6 +126,7 @@ static __init void prom_init_cmdline(voi
+ static __init void prom_init_mem(void)
+ {
+ 	unsigned long mem;
++	unsigned long max;
  
+ 	/* Figure out memory size by finding aliases.
+ 	 *
+@@ -134,8 +135,21 @@ static __init void prom_init_mem(void)
+ 	 * want to reuse the memory used by CFE (around 4MB). That means cfe_*
+ 	 * functions stop to work at some point during the boot, we should only
+ 	 * call them at the beginning of the boot.
++	 * 
++	 * BCM47XX uses 128MB for addressing the ram, if the system contains
++	 * less that that amount of ram it remaps the ram more often into the
++	 * available space.
++	 * Accessing memory after 128MB will cause an exception.
++	 * max contains the biggest possible address supported by the platform.
++	 * If the method wants to try something above we assume 128MB ram.
+ 	 */
++	max = ((unsigned long)(prom_init) | ((128 << 20) - 1));
+ 	for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
++		if (((unsigned long)(prom_init) + mem) > max) {
++			mem = (128 << 20);
++			printk("assume 128MB RAM\n");
++			break;
++		}
+ 		if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
+ 		    *(unsigned long *)(prom_init))
+ 			break;
diff --git a/target/linux/brcm47xx/patches-2.6.31/700-ssb-gigabit-ethernet-driver.patch b/target/linux/brcm47xx/patches-2.6.31/700-ssb-gigabit-ethernet-driver.patch
index 0273343885..f09eb4f509 100644
--- a/target/linux/brcm47xx/patches-2.6.31/700-ssb-gigabit-ethernet-driver.patch
+++ b/target/linux/brcm47xx/patches-2.6.31/700-ssb-gigabit-ethernet-driver.patch
@@ -252,7 +252,7 @@
  	if (tp->tg3_flags & TG3_FLAG_EEPROM_WRITE_PROT) {
  		tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl &
  		       ~GRC_LCLCTRL_GPIO_OUTPUT1);
-@@ -12136,6 +12205,11 @@ static int __devinit tg3_get_invariants(
+@@ -12136,6 +12206,11 @@ static int __devinit tg3_get_invariants(
  	      GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701)))
  		tp->tg3_flags |= TG3_FLAG_SRAM_USE_CONFIG;
  
@@ -264,7 +264,7 @@
  	/* Get eeprom hw config before calling tg3_set_power_state().
  	 * In particular, the TG3_FLG2_IS_NIC flag must be
  	 * determined before calling tg3_set_power_state() so that
-@@ -12513,6 +12587,10 @@ static int __devinit tg3_get_device_addr
+@@ -12513,6 +12588,10 @@ static int __devinit tg3_get_device_addr
  	}
  
  	if (!is_valid_ether_addr(&dev->dev_addr[0])) {
@@ -275,7 +275,7 @@
  #ifdef CONFIG_SPARC
  		if (!tg3_get_default_macaddr_sparc(tp))
  			return 0;
-@@ -13004,6 +13082,7 @@ static char * __devinit tg3_phy_string(s
+@@ -13004,6 +13083,7 @@ static char * __devinit tg3_phy_string(s
  	case PHY_ID_BCM5704:	return "5704";
  	case PHY_ID_BCM5705:	return "5705";
  	case PHY_ID_BCM5750:	return "5750";
@@ -283,7 +283,7 @@
  	case PHY_ID_BCM5752:	return "5752";
  	case PHY_ID_BCM5714:	return "5714";
  	case PHY_ID_BCM5780:	return "5780";
-@@ -13214,6 +13293,13 @@ static int __devinit tg3_init_one(struct
+@@ -13214,6 +13294,13 @@ static int __devinit tg3_init_one(struct
  		tp->msg_enable = tg3_debug;
  	else
  		tp->msg_enable = TG3_DEF_MSG_ENABLE;
diff --git a/target/linux/brcm47xx/patches-2.6.31/800-fix_cfe_detection.patch b/target/linux/brcm47xx/patches-2.6.31/800-fix_cfe_detection.patch
index c3a8a5738a..50f911437c 100644
--- a/target/linux/brcm47xx/patches-2.6.31/800-fix_cfe_detection.patch
+++ b/target/linux/brcm47xx/patches-2.6.31/800-fix_cfe_detection.patch
@@ -90,7 +90,7 @@
  {
  	char buf[CL_SIZE];
  
-@@ -154,9 +130,12 @@ static __init void prom_init_mem(void)
+@@ -160,9 +136,12 @@ static __init void prom_init_mem(void)
  
  void __init prom_init(void)
  {