ArmPlatformPkg/ArmXenRelocatablePlatformLib: Replaced tabulation by spaces
EDK2 coding style requires to use 2 spaces instead of tabulation in source code files. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17094 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin
oliviermartin
parent
df22e1fd50
commit
58bc40654e
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@ -27,211 +27,211 @@
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* In pseudo code, this implementation does the following:
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*
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* for each node {
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* have_device_type = false
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* have_reg = false
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* have_device_type = false
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* have_reg = false
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*
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* for each property {
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* if property value == 'memory' {
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* if property name == 'device_type' {
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* have_device_type = true
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* }
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* } else {
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* if property name == 'reg' {
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* have_reg = true
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* membase = property value[0]
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* memsize = property value[1]
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* }
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* }
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* }
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* if have_device_type and have_reg {
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* return membase and memsize
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* }
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* for each property {
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* if property value == 'memory' {
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* if property name == 'device_type' {
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* have_device_type = true
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* }
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* } else {
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* if property name == 'reg' {
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* have_reg = true
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* membase = property value[0]
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* memsize = property value[1]
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* }
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* }
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* }
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* if have_device_type and have_reg {
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* return membase and memsize
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* }
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* }
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* return NOT_FOUND
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*/
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#define FDT_MAGIC 0xedfe0dd0
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#define FDT_MAGIC 0xedfe0dd0
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#define FDT_BEGIN_NODE 0x1
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#define FDT_END_NODE 0x2
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#define FDT_PROP 0x3
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#define FDT_END 0x9
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#define FDT_BEGIN_NODE 0x1
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#define FDT_END_NODE 0x2
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#define FDT_PROP 0x3
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#define FDT_END 0x9
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xMEMSIZE .req x0 // recorded system RAM size
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xMEMBASE .req x1 // recorded system RAM base
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xMEMSIZE .req x0 // recorded system RAM size
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xMEMBASE .req x1 // recorded system RAM base
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xLR .req x8 // our preserved link register
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xDTP .req x9 // pointer to traverse the DT structure
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xSTRTAB .req x10 // pointer to the DTB string table
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xMEMNODE .req x11 // bit field to record found properties
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xLR .req x8 // our preserved link register
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xDTP .req x9 // pointer to traverse the DT structure
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xSTRTAB .req x10 // pointer to the DTB string table
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xMEMNODE .req x11 // bit field to record found properties
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#define HAVE_REG 0x1
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#define HAVE_DEVICE_TYPE 0x2
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#define HAVE_REG 0x1
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#define HAVE_DEVICE_TYPE 0x2
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.text
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.align 3
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.text
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.align 3
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_memory:
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.asciz "memory"
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.asciz "memory"
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_reg:
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.asciz "reg"
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.asciz "reg"
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_device_type:
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.asciz "device_type"
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.asciz "device_type"
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/*
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* Compare strings in x4 and x5, return in w7
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*/
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.align 3
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/*
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* Compare strings in x4 and x5, return in w7
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*/
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.align 3
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strcmp:
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ldrb w2, [x4], #1
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ldrb w3, [x5], #1
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subs w7, w2, w3
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cbz w2, 0f
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cbz w3, 0f
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beq strcmp
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0: ret
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ldrb w2, [x4], #1
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ldrb w3, [x5], #1
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subs w7, w2, w3
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cbz w2, 0f
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cbz w3, 0f
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beq strcmp
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0: ret
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.globl find_memnode
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.globl find_memnode
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find_memnode:
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// preserve link register
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mov xLR, x30
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mov xDTP, x0
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// preserve link register
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mov xLR, x30
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mov xDTP, x0
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/*
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* Check the DTB magic at offset 0
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*/
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movz w4, #:abs_g0_nc:FDT_MAGIC
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movk w4, #:abs_g1:FDT_MAGIC
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ldr w5, [xDTP]
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cmp w4, w5
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bne err_invalid_magic
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/*
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* Check the DTB magic at offset 0
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*/
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movz w4, #:abs_g0_nc:FDT_MAGIC
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movk w4, #:abs_g1:FDT_MAGIC
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ldr w5, [xDTP]
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cmp w4, w5
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bne err_invalid_magic
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/*
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* Read the string offset and store it for later use
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*/
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ldr w4, [xDTP, #12]
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rev w4, w4
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add xSTRTAB, xDTP, x4
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/*
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* Read the string offset and store it for later use
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*/
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ldr w4, [xDTP, #12]
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rev w4, w4
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add xSTRTAB, xDTP, x4
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/*
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* Read the struct offset and add it to the DT pointer
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*/
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ldr w5, [xDTP, #8]
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rev w5, w5
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add xDTP, xDTP, x5
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/*
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* Read the struct offset and add it to the DT pointer
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*/
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ldr w5, [xDTP, #8]
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rev w5, w5
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add xDTP, xDTP, x5
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/*
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* Check current tag for FDT_BEGIN_NODE
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*/
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ldr w5, [xDTP]
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rev w5, w5
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cmp w5, #FDT_BEGIN_NODE
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bne err_unexpected_begin_tag
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/*
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* Check current tag for FDT_BEGIN_NODE
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*/
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ldr w5, [xDTP]
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rev w5, w5
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cmp w5, #FDT_BEGIN_NODE
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bne err_unexpected_begin_tag
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begin_node:
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mov xMEMNODE, #0
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add xDTP, xDTP, #4
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mov xMEMNODE, #0
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add xDTP, xDTP, #4
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/*
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* Advance xDTP past NULL terminated string
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*/
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0: ldrb w4, [xDTP], #1
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cbnz w4, 0b
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/*
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* Advance xDTP past NULL terminated string
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*/
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0: ldrb w4, [xDTP], #1
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cbnz w4, 0b
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next_tag:
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/*
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* Align the DT pointer xDTP to the next 32-bit boundary
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*/
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add xDTP, xDTP, #3
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and xDTP, xDTP, #~3
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/*
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* Align the DT pointer xDTP to the next 32-bit boundary
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*/
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add xDTP, xDTP, #3
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and xDTP, xDTP, #~3
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/*
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* Read the next tag, could be BEGIN_NODE, END_NODE, PROP, END
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*/
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ldr w5, [xDTP]
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rev w5, w5
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cmp w5, #FDT_BEGIN_NODE
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beq begin_node
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cmp w5, #FDT_END_NODE
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beq end_node
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cmp w5, #FDT_PROP
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beq prop_node
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cmp w5, #FDT_END
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beq err_end_of_fdt
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b err_unexpected_tag
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/*
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* Read the next tag, could be BEGIN_NODE, END_NODE, PROP, END
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*/
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ldr w5, [xDTP]
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rev w5, w5
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cmp w5, #FDT_BEGIN_NODE
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beq begin_node
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cmp w5, #FDT_END_NODE
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beq end_node
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cmp w5, #FDT_PROP
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beq prop_node
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cmp w5, #FDT_END
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beq err_end_of_fdt
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b err_unexpected_tag
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prop_node:
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/*
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* If propname == 'reg', record as membase and memsize
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* If propname == 'device_type' and value == 'memory',
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* set the 'is_memnode' flag for this node
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*/
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ldr w6, [xDTP, #4]
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add xDTP, xDTP, #12
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rev w6, w6
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mov x5, xDTP
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adr x4, _memory
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bl strcmp
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/*
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* If propname == 'reg', record as membase and memsize
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* If propname == 'device_type' and value == 'memory',
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* set the 'is_memnode' flag for this node
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*/
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ldr w6, [xDTP, #4]
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add xDTP, xDTP, #12
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rev w6, w6
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mov x5, xDTP
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adr x4, _memory
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bl strcmp
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/*
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* Get handle to property name
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*/
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ldr w5, [xDTP, #-4]
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rev w5, w5
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add x5, xSTRTAB, x5
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/*
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* Get handle to property name
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*/
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ldr w5, [xDTP, #-4]
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rev w5, w5
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add x5, xSTRTAB, x5
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cbz w7, check_device_type
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cbz w7, check_device_type
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/*
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* Check for 'reg' property
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*/
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adr x4, _reg
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bl strcmp
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cbnz w7, inc_and_next_tag
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/*
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* Check for 'reg' property
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*/
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adr x4, _reg
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bl strcmp
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cbnz w7, inc_and_next_tag
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/*
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* Extract two 64-bit quantities from the 'reg' property. These values
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* will only be used if the node also turns out to have a device_type
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* property with a value of 'memory'.
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*
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* NOTE: xDTP is only guaranteed to be 32 bit aligned, and we are most
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* likely executing with the MMU off, so we cannot use 64 bit
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* wide accesses here.
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*/
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ldp w4, w5, [xDTP]
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orr xMEMBASE, x4, x5, lsl #32
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ldp w4, w5, [xDTP, #8]
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orr xMEMSIZE, x4, x5, lsl #32
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rev xMEMBASE, xMEMBASE
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rev xMEMSIZE, xMEMSIZE
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orr xMEMNODE, xMEMNODE, #HAVE_REG
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b inc_and_next_tag
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/*
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* Extract two 64-bit quantities from the 'reg' property. These values
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* will only be used if the node also turns out to have a device_type
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* property with a value of 'memory'.
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*
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* NOTE: xDTP is only guaranteed to be 32 bit aligned, and we are most
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* likely executing with the MMU off, so we cannot use 64 bit
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* wide accesses here.
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*/
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ldp w4, w5, [xDTP]
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orr xMEMBASE, x4, x5, lsl #32
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ldp w4, w5, [xDTP, #8]
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orr xMEMSIZE, x4, x5, lsl #32
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rev xMEMBASE, xMEMBASE
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rev xMEMSIZE, xMEMSIZE
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orr xMEMNODE, xMEMNODE, #HAVE_REG
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b inc_and_next_tag
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check_device_type:
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/*
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* Check whether the current property's name is 'device_type'
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*/
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adr x4, _device_type
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bl strcmp
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cbnz w7, inc_and_next_tag
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orr xMEMNODE, xMEMNODE, #HAVE_DEVICE_TYPE
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/*
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* Check whether the current property's name is 'device_type'
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*/
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adr x4, _device_type
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bl strcmp
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cbnz w7, inc_and_next_tag
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orr xMEMNODE, xMEMNODE, #HAVE_DEVICE_TYPE
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inc_and_next_tag:
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add xDTP, xDTP, x6
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b next_tag
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add xDTP, xDTP, x6
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b next_tag
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end_node:
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/*
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* Check for device_type = memory and reg = xxxx
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* If we have both, we are done
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*/
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add xDTP, xDTP, #4
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cmp xMEMNODE, #(HAVE_REG | HAVE_DEVICE_TYPE)
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bne next_tag
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/*
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* Check for device_type = memory and reg = xxxx
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* If we have both, we are done
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*/
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add xDTP, xDTP, #4
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cmp xMEMNODE, #(HAVE_REG | HAVE_DEVICE_TYPE)
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bne next_tag
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ret xLR
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ret xLR
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err_invalid_magic:
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err_unexpected_begin_tag:
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err_unexpected_tag:
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err_end_of_fdt:
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wfi
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wfi
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