powerpc/doc: Update the README.srio-pcie-boot-corenet

1. Misalignment will be found in the doc/README.srio-pcie-boot-corenet file when the tabs are set to 8 characters. And the standard for u-boot should be 8 character tabs! So this issue should be amended. 2. Add a NOTE for the ENV parameters of the Slave. Signed-off-by: Liu Gang <Gang.Liu@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>

powerpc/doc: Update the README.srio-pcie-boot-corenet
1. Misalignment will be found in the doc/README.srio-pcie-boot-corenet file when the tabs are set to 8 characters. And the standard for u-boot should be 8 character tabs! So this issue should be amended. 2. Add a NOTE for the ENV parameters of the Slave. Signed-off-by: Liu Gang <Gang.Liu@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
Liu Gang · Andy Fleming
1 parent f64bd7c038
Showing 1 changed file with 20 additions and 14 deletions Side-by-side Diff
doc/README.srio-pcie-boot-corenet
@@ -21,13 +21,13 @@
 	e) Slave's RCW should configure the SerDes for SRIO or PCIE boot port, set
 	   the boot location to SRIO or PCIE, and holdoff all the cores.
  
-	----------        -----------             -----------
-	|		  |       |         |             |         |
-	|		  |       |         |             |         |
+	-----------       -----------             -----------
+	|         |       |         |             |         |
+	|         |       |         |             |         |
 	| NorFlash|<----->| Master  |SRIO or PCIE |  Slave  |<---->[EEPROM]
-	|		  |       |         |<===========>|         |
-	|		  |       |         |             |         |
-	----------        -----------             -----------
+	|         |       |         |<===========>|         |
+	|         |       |         |             |         |
+	-----------       -----------             -----------
  
 The example based on P4080DS platform:
 	Two P4080DS platforms can be used to implement the boot from SRIO or PCIE.
  
  
  
  
  
@@ -87,27 +87,33 @@
 	   Please refer to the examples given above.
  
 	2. U-Boot image's compilation.
-		For master, U-Boot image should be generated normally.
+	   For master, U-Boot image should be generated normally.
  
-		For example, master U-Boot image used on P4080DS should be compiled with
+	   For example, master U-Boot image used on P4080DS should be compiled with
  
 				make P4080DS_config.
  
-		For slave, U-Boot image should be generated specifically by
+	   For slave, U-Boot image should be generated specifically by
  
 				make xxxx_SRIO_PCIE_BOOT_config.
  
-		For example, slave U-Boot image used on P4080DS should be compiled with
+	   For example, slave U-Boot image used on P4080DS should be compiled with
  
 				make P4080DS_SRIO_PCIE_BOOT_config.
  
 	3. Necessary modifications based on a specific environment.
-		For a specific environment, the addresses of the slave's U-Boot image,
-		UCode, ENV stored in master's NorFlash, and any other configurations
-		can be modified in the file:
-					include/configs/corenet_ds.h.
+	   For a specific environment, the addresses of the slave's U-Boot image,
+	   UCode, ENV stored in master's NorFlash, and any other configurations
+	   can be modified in the file:
+				include/configs/corenet_ds.h.
  
 	4. Set and save the environment variable "bootmaster" with "SRIO1", "SRIO2"
 	   or "PCIE1", "PCIE2", "PCIE3" for master, and then restart it in order to
 	   perform the role as a master for boot from SRIO or PCIE.
+
+NOTE: When the Slave's ENV parameters are stored in Master's NorFlash,
+      it can fetch them through PCIE or SRIO interface. But the ENV
+      parameters can not be modified by "saveenv" or other commands under
+      the Slave's u-boot environment, because the Slave can not erase,
+      write Master's NorFlash by PCIE or SRIO link.
...	...	@@ -21,13 +21,13 @@
21	21	e) Slave's RCW should configure the SerDes for SRIO or PCIE boot port, set
22	22	the boot location to SRIO or PCIE, and holdoff all the cores.
23	23
24		- ---------- ----------- -----------
25		- \| \| \| \| \| \|
26		- \| \| \| \| \| \|
	24	+ ----------- ----------- -----------
	25	+ \| \| \| \| \| \|
	26	+ \| \| \| \| \| \|
27	27	\| NorFlash\|<----->\| Master \|SRIO or PCIE \| Slave \|<---->[EEPROM]
28		- \| \| \| \|<===========>\| \|
29		- \| \| \| \| \| \|
30		- ---------- ----------- -----------
	28	+ \| \| \| \|<===========>\| \|
	29	+ \| \| \| \| \| \|
	30	+ ----------- ----------- -----------
31	31
32	32	The example based on P4080DS platform:
33	33	Two P4080DS platforms can be used to implement the boot from SRIO or PCIE.
34	34
35	35
36	36
37	37
38	38
...	...	@@ -87,27 +87,33 @@
87	87	Please refer to the examples given above.
88	88
89	89	2. U-Boot image's compilation.
90		- For master, U-Boot image should be generated normally.
	90	+ For master, U-Boot image should be generated normally.
91	91
92		- For example, master U-Boot image used on P4080DS should be compiled with
	92	+ For example, master U-Boot image used on P4080DS should be compiled with
93	93
94	94	make P4080DS_config.
95	95
96		- For slave, U-Boot image should be generated specifically by
	96	+ For slave, U-Boot image should be generated specifically by
97	97
98	98	make xxxx_SRIO_PCIE_BOOT_config.
99	99
100		- For example, slave U-Boot image used on P4080DS should be compiled with
	100	+ For example, slave U-Boot image used on P4080DS should be compiled with
101	101
102	102	make P4080DS_SRIO_PCIE_BOOT_config.
103	103
104	104	3. Necessary modifications based on a specific environment.
105		- For a specific environment, the addresses of the slave's U-Boot image,
106		- UCode, ENV stored in master's NorFlash, and any other configurations
107		- can be modified in the file:
108		- include/configs/corenet_ds.h.
	105	+ For a specific environment, the addresses of the slave's U-Boot image,
	106	+ UCode, ENV stored in master's NorFlash, and any other configurations
	107	+ can be modified in the file:
	108	+ include/configs/corenet_ds.h.
109	109
110	110	4. Set and save the environment variable "bootmaster" with "SRIO1", "SRIO2"
111	111	or "PCIE1", "PCIE2", "PCIE3" for master, and then restart it in order to
112	112	perform the role as a master for boot from SRIO or PCIE.
	113	+
	114	+NOTE: When the Slave's ENV parameters are stored in Master's NorFlash,
	115	+ it can fetch them through PCIE or SRIO interface. But the ENV
	116	+ parameters can not be modified by "saveenv" or other commands under
	117	+ the Slave's u-boot environment, because the Slave can not erase,
	118	+ write Master's NorFlash by PCIE or SRIO link.