1 /* |
1 /* |
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
53 // Initialize the members of this class. The biased start address of this array |
53 // Initialize the members of this class. The biased start address of this array |
54 // is the bias (in elements) multiplied by the element size. |
54 // is the bias (in elements) multiplied by the element size. |
55 void initialize_base(address base, size_t length, size_t bias, size_t elem_size, uint shift_by) { |
55 void initialize_base(address base, size_t length, size_t bias, size_t elem_size, uint shift_by) { |
56 assert(base != NULL, "just checking"); |
56 assert(base != NULL, "just checking"); |
57 assert(length > 0, "just checking"); |
57 assert(length > 0, "just checking"); |
58 assert(shift_by < sizeof(uintptr_t) * 8, err_msg("Shifting by %zd, larger than word size?", shift_by)); |
58 assert(shift_by < sizeof(uintptr_t) * 8, err_msg("Shifting by %u, larger than word size?", shift_by)); |
59 _base = base; |
59 _base = base; |
60 _length = length; |
60 _length = length; |
61 _biased_base = base - (bias * elem_size); |
61 _biased_base = base - (bias * elem_size); |
62 _bias = bias; |
62 _bias = bias; |
63 _shift_by = shift_by; |
63 _shift_by = shift_by; |
69 assert(mapping_granularity_in_bytes > 0, "just checking"); |
69 assert(mapping_granularity_in_bytes > 0, "just checking"); |
70 assert(is_power_of_2(mapping_granularity_in_bytes), |
70 assert(is_power_of_2(mapping_granularity_in_bytes), |
71 err_msg("mapping granularity must be power of 2, is %zd", mapping_granularity_in_bytes)); |
71 err_msg("mapping granularity must be power of 2, is %zd", mapping_granularity_in_bytes)); |
72 assert((uintptr_t)bottom % mapping_granularity_in_bytes == 0, |
72 assert((uintptr_t)bottom % mapping_granularity_in_bytes == 0, |
73 err_msg("bottom mapping area address must be a multiple of mapping granularity %zd, is "PTR_FORMAT, |
73 err_msg("bottom mapping area address must be a multiple of mapping granularity %zd, is "PTR_FORMAT, |
74 mapping_granularity_in_bytes, bottom)); |
74 mapping_granularity_in_bytes, p2i(bottom))); |
75 assert((uintptr_t)end % mapping_granularity_in_bytes == 0, |
75 assert((uintptr_t)end % mapping_granularity_in_bytes == 0, |
76 err_msg("end mapping area address must be a multiple of mapping granularity %zd, is "PTR_FORMAT, |
76 err_msg("end mapping area address must be a multiple of mapping granularity %zd, is "PTR_FORMAT, |
77 mapping_granularity_in_bytes, end)); |
77 mapping_granularity_in_bytes, p2i(end))); |
78 size_t num_target_elems = pointer_delta(end, bottom, mapping_granularity_in_bytes); |
78 size_t num_target_elems = pointer_delta(end, bottom, mapping_granularity_in_bytes); |
79 idx_t bias = (uintptr_t)bottom / mapping_granularity_in_bytes; |
79 idx_t bias = (uintptr_t)bottom / mapping_granularity_in_bytes; |
80 address base = create_new_base_array(num_target_elems, target_elem_size_in_bytes); |
80 address base = create_new_base_array(num_target_elems, target_elem_size_in_bytes); |
81 initialize_base(base, num_target_elems, bias, target_elem_size_in_bytes, log2_intptr(mapping_granularity_in_bytes)); |
81 initialize_base(base, num_target_elems, bias, target_elem_size_in_bytes, log2_intptr(mapping_granularity_in_bytes)); |
82 } |
82 } |