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authorLiu Gang <Gang.Liu@freescale.com>2012-03-08 00:33:20 +0000
committerAndy Fleming <afleming@freescale.com>2012-04-24 23:58:33 -0500
commit0a85a9e70593a9cd90fbbbdaad8443e31a9dd5a3 (patch)
tree661a5f2efc24df9044e7eb6e4e84234445ffa04c /arch/powerpc
parent3f1af81b80576bb696cc0ea2169541ee13902ce0 (diff)
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powerpc/corenet_ds: Slave reads ENV from master when boot from SRIO
When boot from SRIO, slave's ENV can be stored in master's memory space, then slave can fetch the ENV through SRIO interface. NOTE: Because the slave can not erase, write master's NOR flash by SRIO interface, so it can not modify the ENV parameters stored in master's NOR flash using "saveenv" or other commands. Master needs to: 1. Put the slave's ENV into it's own memory space. 2. Set an inbound SRIO window covered slave's ENV stored in master's memory space. Slave needs to: 1. Set a specific TLB entry in order to fetch ucode and ENV from master. 2. Set a LAW entry with the TargetID SRIO1 or SRIO2 for ucode and ENV. Signed-off-by: Liu Gang <Gang.Liu@freescale.com> Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/cpu/mpc8xxx/srio.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/srio.c b/arch/powerpc/cpu/mpc8xxx/srio.c
index e593f22..5694561 100644
--- a/arch/powerpc/cpu/mpc8xxx/srio.c
+++ b/arch/powerpc/cpu/mpc8xxx/srio.c
@@ -150,5 +150,22 @@ void srio_boot_master(void)
.port[CONFIG_SRIOBOOT_MASTER_PORT].inbw[2].riwar,
SRIO_IB_ATMU_AR
| atmu_size_mask(CONFIG_SRIOBOOT_SLAVE_UCODE_SIZE));
+
+ /* configure inbound window for slave's ENV */
+ debug("SRIOBOOT - MASTER: Inbound window for slave's ENV; "
+ "Local = 0x%llx, Siro = 0x%llx, Size = 0x%x\n",
+ CONFIG_SRIOBOOT_SLAVE_ENV_LAW_PHYS,
+ CONFIG_SRIOBOOT_SLAVE_ENV_SRIO_PHYS,
+ CONFIG_SRIOBOOT_SLAVE_ENV_SIZE);
+ out_be32((void *)&srio->atmu
+ .port[CONFIG_SRIOBOOT_MASTER_PORT].inbw[3].riwtar,
+ CONFIG_SRIOBOOT_SLAVE_ENV_LAW_PHYS >> 12);
+ out_be32((void *)&srio->atmu
+ .port[CONFIG_SRIOBOOT_MASTER_PORT].inbw[3].riwbar,
+ CONFIG_SRIOBOOT_SLAVE_ENV_SRIO_PHYS >> 12);
+ out_be32((void *)&srio->atmu
+ .port[CONFIG_SRIOBOOT_MASTER_PORT].inbw[3].riwar,
+ SRIO_IB_ATMU_AR
+ | atmu_size_mask(CONFIG_SRIOBOOT_SLAVE_ENV_SIZE));
}
#endif