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author | Anton Staaf <robotboy@chromium.org> | 2011-10-11 10:22:29 -0700 |
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committer | Jon Loeliger <jdl@jdl.com> | 2011-10-11 12:58:30 -0500 |
commit | 033089f29099bdfd5c2d6986cdb9fd07b16cfde0 (patch) | |
tree | 00e42d38d1bcd5013b16d72a74c3e9c98f3f7f86 /dtc-lexer.l | |
parent | a4b515c03804dbc0eff5bbf281bd22438717e773 (diff) | |
download | dtc-033089f29099bdfd5c2d6986cdb9fd07b16cfde0.tar.gz |
dtc: Add support for variable sized elements
Elements of size 8, 16, 32, and 64 bits are supported. The new
/bits/ syntax was selected so as to not pollute the reserved
keyword space with uint8/uint16/... type names.
With this patch the following property assignment:
property = /bits/ 16 <0x1234 0x5678 0x0 0xffff>;
is equivalent to:
property = <0x12345678 0x0000ffff>;
It is now also possible to directly specify a 64 bit literal in a
cell list, also known as an array using:
property = /bits/ 64 <0xdeadbeef00000000>;
It is an error to attempt to store a literal into an element that is
too small to hold the literal, and the compiler will generate an
error when it detects this. For instance:
property = /bits/ 8 <256>;
Will fail to compile. It is also an error to attempt to place a
reference in a non 32-bit element.
The documentation has been changed to reflect that the cell list
is now an array of elements that can be of sizes other than the
default 32-bit cell size.
The sized_cells test tests the creation and access of 8, 16, 32,
and 64-bit sized elements. It also tests that the creation of two
properties, one with 16 bit elements and one with 32 bit elements
result in the same property contents.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'dtc-lexer.l')
-rw-r--r-- | dtc-lexer.l | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/dtc-lexer.l b/dtc-lexer.l index 494e342..73d190c 100644 --- a/dtc-lexer.l +++ b/dtc-lexer.l @@ -97,6 +97,12 @@ static int pop_input_file(void); return DT_MEMRESERVE; } +<*>"/bits/" { + DPRINT("Keyword: /bits/\n"); + BEGIN_DEFAULT(); + return DT_BITS; + } + <*>{LABEL}: { DPRINT("Label: %s\n", yytext); yylval.labelref = xstrdup(yytext); |