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
SVN-Revision: 20072
--- 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;
if (tp->tg3_flags & TG3_FLAG_EEPROM_WRITE_PROT) {
tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl &
~GRC_LCLCTRL_GPIO_OUTPUT1);
-@@ -12099,6 +12168,11 @@ static int __devinit tg3_get_invariants(
+@@ -12099,6 +12169,11 @@ 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;
/* 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
-@@ -12474,6 +12548,10 @@ static int __devinit tg3_get_device_addr
+@@ -12474,6 +12549,10 @@ static int __devinit tg3_get_device_addr
}
if (!is_valid_ether_addr(&dev->dev_addr[0])) {
#ifdef CONFIG_SPARC
if (!tg3_get_default_macaddr_sparc(tp))
return 0;
-@@ -12965,6 +13043,7 @@ static char * __devinit tg3_phy_string(s
+@@ -12965,6 +13044,7 @@ 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";
case PHY_ID_BCM5752: return "5752";
case PHY_ID_BCM5714: return "5714";
case PHY_ID_BCM5780: return "5780";
-@@ -13175,6 +13254,13 @@ static int __devinit tg3_init_one(struct
+@@ -13175,6 +13255,13 @@ static int __devinit tg3_init_one(struct
tp->msg_enable = tg3_debug;
else
tp->msg_enable = TG3_DEF_MSG_ENABLE;
{
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)
{
--- 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;
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;
/* 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])) {
#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";
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;
{
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)
{
--- 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;
drivers/ssb/driver_mipscore.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
-diff --git a/drivers/ssb/driver_mipscore.c b/drivers/ssb/driver_mipscore.c
-index 3c6feed..97efce1 100644
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
-@@ -270,7 +270,6 @@ void ssb_mipscore_init(struct ssb_mipscore *mcore)
+@@ -270,7 +270,6 @@ void ssb_mipscore_init(struct ssb_mipsco
set_irq(dev, irq++);
}
break;
case SSB_DEV_PCI:
case SSB_DEV_ETHERNET:
case SSB_DEV_ETHERNET_GBIT:
-@@ -281,6 +280,10 @@ void ssb_mipscore_init(struct ssb_mipscore *mcore)
+@@ -281,6 +280,10 @@ void ssb_mipscore_init(struct ssb_mipsco
set_irq(dev, irq++);
break;
}
}
}
ssb_dprintk(KERN_INFO PFX "after irq reconfiguration\n");
---
-1.7.0
-
{
static char buf[CL_SIZE] __initdata;
-@@ -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)
{
--- /dev/null
+--- a/arch/mips/bcm47xx/prom.c
++++ b/arch/mips/bcm47xx/prom.c
+@@ -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.
+ *
+@@ -134,21 +135,26 @@ 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;
+ }
+
+- /* 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);
+ }
+
{
static char buf[COMMAND_LINE_SIZE] __initdata;
-@@ -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)
{
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